Well you kinda just made my point. Your average is 8.3 mine is just under 6, and your team shoots 3% better than mine, and you would have had to train them at least 2 weeks longer. So is two weeks of training worth 3% better free throw percentage?
Your last statement is true though, but in my guy that had the atrocious FTs it only took a few pops to make him much better. So if you do have a guy that has terrible FTs it isn't hard to boost his percentage pretty quickly.