Yeah cause god knows you can't become stronger without ATG squatting. Elite athletes do strength exercises, they ARE STRONG, but many of them don't do full squats. In fact, I wonder how many Olympic athletes do real, honest-to-god full squats in their training, lifters aside. Or how many players within a given pro sport.
Do you think Rajon Rondo full squats when he trains? How about Vince Young? How about Chris Johnson? How about Cristiano Ronaldo? Dwight Howard? Jason Kidd? Andre Agassi, back in the day? How about Lindsay Vonn? I don't know, but I highly doubt it. Why should they invest time, energy and mental focus in steven-miller-approved full squatting? They spend all their time and energy doing important things, like getting better at their sport.
Elite athletes are often very strong/fast/amazing because of other reasons than training - at least to a substantial degree. That is also the reason why mentioned people might not even be familiar with a weight room. That however does not mean that the same source of action (becoming stronger being secondary to 6 days a week skill training for ones sport) is indicated for you and me to optimize results.
What? Sure, you need good genetics to be an elite athlete, but beyond that, how other than a decade plus of busting their asses in training do you think elite athletes get strong/fast/amazing? I squat because, like you say, I'm a hobbyist. I like to squat full and feel better about myself when I do than when I catch myself "cheating" on reps. And make no mistake, squatting is a fantastic exercise for developing leg strength. Duh. I would probably keep squatting full if I were to throw myself more completely into mastering a particular sport, for those reasons. But I don't for a second think that squatting is some kind of magical exercise that becomes infinitely more valuable when done through a larger range of movement.