@amishclone imagine thinking Tamin Lipsey is lazy because of missed free throws.
There is a lot that goes into free throws. There is the general form, the consistency of said form, the mental aspect of shooting a free throw, variance of fatigue, home vs away environment, etc.
I think there is a decent chance some coaches have done better at getting their players to have more consistency in their routine of having a mental mindset, mechanics, and results than some others and also players who individually are better than others. But people attributing it to simply "practice" is fairly shortsighted.
With that said I think Tamin definitely has the ability to be much better than he has. But saying what exactly is missing...whether staff intervention, personal mindset, mechanics, etc. is tough to pinpoint. Were it super easy we wouldn't be having that problem.