^ see my post just before yours, not talking about skill but strength
you're imagining a dichotomy that's not there. sports strength like what you're talking about with the skinny little guy who can't be stripped IS skill. and that skill IS strength. they are the same. i'm not trying to be zen, that's just the way it is. no other measure than "can you take the ball from him when he's going to the hoop" is worth anything when you're measuring his strength at holding onto the ball when he's going to the hoop. i would bet $100 that the only "measurement" that correlates strongly would be something like how fast he can get through taylorhorton's dribbling complex.
edit: and if you took that guy and added barbell strength WHILE NOT ALLOWING HIS SKILLS TO DEGRADE, he would be even harder to take the ball from. but improving his ball handling even further obviously is not going to have a strong influence on his bench. as for what's appropriate for an individual's progression as a player, it depends on the individual. if i wanted to get better at basketball i'd be best-off dropping almost all of my weight room work and spending nearly all of my training time on the court. i'm reasonably strong but mediocre at basketball. if anthony davis wants to get better at basketball he should probably spend a bit more time working on his bench. he's skinny like a runway model but has breathtaking skills for someone his height.
I agree 100% with LBSS and Mutumbo on this one. Your making up qualities that don't exist. If you have ever done manual labor perhaps you have heard of something called "old-man strength". That's the made up strength quality where your uncle can unscrew bolts and saw faster than you even though your stronger in the weight-room. In reality there is not such thing as "old-man strength" it's just a combination of grip strength and labor skills that the young person hasn't developed.
There are two things going on here.
1) As LBSS said the skinny guy who can't be stripped IS skillful to such a degree that you can't see it. Perhaps he wraps the ball better in contact; perhaps he actually brings the ball down on his reverse layup with more precise timing, etc. The effect is he is hard to strip, the cause is he has developed a lot more skill than the next guy. His skill level at keeping the ball may be somewhat unconscious (eg he isn't thinking "let me cradle the ball strongest here on my spin move because this is where it's mostly likely poked out by the help defense") but it's a learned and develop skill, not a magical "strength hardness". A few years ago we used to play a lot of pickup basketball after practice and since I look somewhat bigger than your average guy when I would jump into contact and score other players would say "weight room". I don't know if they save that in Australia but it's an American colloqualism for when you score the ball essentially going through the other player. What's funny is it has more to do with body mass, leverage, and skill than anything in the weight-room.
2) As Mutumbo said.... There is just no replacement for toughness. Unfortunately, this might be a bit harder for someone to acquire because you can practice all you want but you might not have toughness. Toughness is really acquired pretty young; you can pretty much tell from an early age which kids have it and which kids don't. Basically the kid with all the broken bones who doesn't seem to fear much socially or physically and is a bit crazy... Usually only children/first children have less toughness and young girls are more cautious. Exceptions to every rule. One way to be tough is to just naturally not give a fuck or have a bunch of older brothers that beat the hell out of you all the time... The thing about being fearless is it's a bit maladaptive... I think the only way to really acquire toughness is to play a collision sport where you realize that you just have to let go and go absolutely crazy. I didn't start playing football until high-school and I was pretty afraid to hit during drills because they coach was forced to make us watch tons of videos about spearing and paralysis so I tackled high with my head to the sky and and always received blows when tackling. One day I was already moving full speed and somebody came out of no-where and I had little choice but to dip a shoulder and I was able to pancake the guy and continue running over him. After that I realized the benefit of delivering the blow rather than receiving it and became somewhat addicted to tackling and started playing like the strongest guy on the field....
The confound here is described in point #2. To some extent you can figure out "toughness/physicality".... but it's easier to figure it out if you are also bigger and stronger to begin with. Throwing your body into the other player will almost always yield a better result than flinching and cowering... but if your really weak your gonna get wrecked and your glasses broken either way.... so you won't get as much positive feedback to inspire your toughness. Perhaps your teammate complain that your soft.... But since you are tall and useful to the team they don't complain very loudly.
The bottom line for you is to not go down any further the path which you have started. No offense but I call this the typical "nerd" approach to sports. They find that they have some disadvantage (example: "you get the ball stripped the other guy doesn't") and then they take an approach where they essentially say "Ok back to the lab to figure out how to model the problem and ameliorate this deficit".... Then the waste a bunch of time doing shit like band bicep curls with my hands clasped to increase strength for ripping the ball through the lane... This is the kind of idiocy that spawns things like bosu ball squats....
Don't waste your time... Yes, you might be too old to get the type of toughness Charles Barkley had. But if you want to be the best forward you can be in basketball you just have to go down your checklist and KEEP IT SIMPLE: Get bigger and stronger in the weight room, practice, practice, practice to get better and better at the game, AND TRY HARDER, imagine something that makes you mad, go to a crazy place, whatever works for you, but play and practice inspired and it will fall into place. You are doing great and doing all you can do... Don't derail yourself.