I wonder how often they check the baskets to make sure they are correctly positioned both at the height level and distance from the free throw line. Sounds dumb, I know, but a little bit "off" in those things can really affect things.
BYU BB players have all shot thousands of free throws. A lot of them seem to be missing just "off" a little bit in the same way - back of iron, like the BB stand is pushed forward half an inch out of place. Maybe I'm being ridiculous, but to have so many players so "Off" seems a bit weird to me.