The thing about Ben is it's not a given he starts being able to shoot.
I heard Ray Allen in an interview say he only shot about a hundred shots a day but he'd make sure they all were good shots. He was saying a lot of players shoot 1000 shots a day but if they're bad shots it doesn't matter and their isn't much improvement to be made.
With Ben it's not just form, he hovers in the air before getting in his shooting motion, then a delayed release and the shot is always flat with little to no rotation. That's a lot to reconstruct