Yeah idk how using more hips will help. Most top shooters have a slight lean or fade on their shot which makes involving the hips harder.
Also, probably not the best picture to illustrate the idea. Looks like he's in transition and has pulled up hence the hip angle.
You don't need to do heavy jump squats for shooting. Name 1 top shooter who has tremendous leg strength. Curry? Nash? Nowitzki? Kobe? I think you're looking in the wrong areas.
Looked over the tape of yesterdays shooting. I noticed 2 main things, 1)i shoot the ball entirely from the wrist/arms and 2)with no hip involvement. So if i was a better shooter i'd be more hip and less wrist, this would make me a better player because 1 is affected easily by fatigue whereas 2 would not be. So i can improve my shooting considerably by .......... being ......... more....... hip ...... dominant.
OH MAN. Ok, you should definitely not matter what you do make sure that you DO NOT work with a shooting coach. Most shooting coaches will gladly tell you that their is some magic bullet to fix your should and cause you to do even more paralysis by analysis, get in your head even more, do some strange weight room movement that you think well carryover (seriously heavy jump squats provide specificity for shooting????) and you will end up 10x worse at shooting.
Coges advice is spot on (except for the index finger thing) and you have ignored it completely and stuck to a claim you have no evidence for because... well because that's what you do.
I have worked with NBA shooting coaches, former NBA players, and the honest ones will tell you the disappointing truth that shooting accuracy unfortunately doesn't come from changes in technique. I mean just look at the great shooters of the NBA:
Reggie Miller shot the ball with two hands, Larry Bird and Manu Ginobili literally through the ball into the hoop, Steve Nash heaved the ball from his chest. Magic Johnson had a set shot (and shot 90% from the line and 50% from the field) There is no technique change that makes you a better shot. What a shooting coach can teach you is the following:
1) Get a technique that is repeatable***. Usually this is going to be one without a lot of wasted movement - but again it doesn't really matter as much as it is repeatable for you. There are tricks to getting YOUR technique more repeatable (maybe the index finger cue works for Coges), I find that a quarter between the thumb and index finger helps players whose shot is not repeatable because sometimes there thumb is involved (giving a gyroball effect) and some sometimes it isn't. Of course despite the fact that most coaches don't like "thumbing" it's a problem mostly because it isn't repeated - Tim Hardaway Sr. thumbed every single shot and was a great shooter at the end of his career.
2) Practice the shot a lot. We have seen old guys with very little strength hit 100s of shots in a row by practicing OVER and OVER and OVER. If you stick with a shot technique and practice it - you too will do this.
3) Practice shots rather than shooting around. Get a rebounder and have him feed you balls that you catch and dribble and right left plant and then shoot. If you run off a lot of screens and catch and shoot then practice this. Practicing shooting a lot will make you good at shooting in practice - to make shots in games you need to actually practicing shooting off the catch/dribble (however you play).
*** Here is the exception. If you are a high level player and you shoot the ball in traffic you may need a shot that is not only repeatable but also one you can get off. This might require change to technique - but it's not for accuracy - it's to get the ball off over or before the defense comes. Again there is more than one way to solve this. Kobe Bryant has a high release point and shoots at the top of his jump (allowing him to shoot over defenders), Steph Curry has a completely non-textbook low release (textbook wise Klay Thompson's shot is far better) BUT releases his shot so fast that the defense isn't there yet. Curry, cannot back a player down, spin and then rise up over players with his shooting style (but this minor inability doesn't matter much because he has practically given up shooting two point shots).
You are COMPLETELY off base with the hips argument, think of the actual muscles involved in the shot and how different people accomplish it..
1) Look at women shoot. Completely different shot than most men. The hips and legs of women are much closer to being on par as far as strength of men... The upper body is much weaker. A lot of women shoot a truly hip-dominant shot where they pop the ball up using their hips off the ground. You do not want this shot.
2) The hips need to either rotate and provide lift or they can produce horizontal power when used in the air (sweep and sway). It's not practical or repeatable to jump extremely high on your shot (think fatigue and small spaces), so you don't need to execute maximal jumps on every shot.
The one time players do use a lot of hip action is when they shoot at the top of their jump (think Kobe Bryant rising up and shooting a turnaround from 10 feet behind the three point line). This is because if they find themselves floating very far from the hoop and they don't have the ground with which to make force they can keep the same wrist action and supply extra power by popping their hips (you have seen this - feet go forward but goes back). This does provide more horizontal force but it doesn't provide vertical force so it lowers the shot angle which makes it harder to hit. Not surprisingly players are less accurate from father away....
All except for Steph Curry that is. Steph Curry is unique in that he doesn't adjust with his hips (which by the way are far more fatigued at the end of the game than the wrists) but actually adjusts with his arms and shot angle (the farther he is the more he shoots like a weak little kid who needs to heave it up to make it). This is pretty unique and somewhat incredible but incredibly effective. It goes against shooting dogma which says only kids are allowed to shoot the ball from below their head but it sure seems currys ability to keep his hips/legs doing the same thing every time and adjusting with his arms and shot angle is far more effective than anything else...
Bottom line is I haven't seen you shoot (other than free throws) but I don't see anything wrong with your shot. If you are strong enough to shoot the ball from the three point line in and are not accurate enough you need to practice and you need to practice smart real-game shots. You need to do it over and over again and you need to settle on mechanics that are repeatable for you. If you want to release with flat hands (like Jordan) that's fine. If you want to do what the call the shooters fork (three fingers down and thumb and pinky up) that's fine, if you want to to release with thumb and index finger touching that's also fine. It doesn't matter. It needs to be form that you can get off for your position in game (some combination of quick release or release height) and it needs to be something that is mechanically not so complicated that you cannot repeat it. That's it. Then you need to practice. A lot. AND - you need to settle on a bw. Massive changes in BW will KILL your shot. Ray Allen stayed within 6 pounds of a certain weight for years and years. Going from 200lbs to 165lbs and back to 190lbs is a recipe for being a terrible shooter. Pick a weight. Stick with it. Shoot. Keep shooting. You will be fine.