> Of course 10k hours doesn't guarantee mastery either. I've put in that much on the golf course, and I still suck at it. You might have put that much time int

> Of course 10k hours doesn't guarantee mastery either. I've put in that much on the golf course, and I still suck at it. You might have put that much time into the skill of walking around a golf course, which is not a part of the mastery of the game. I don't know if 10k hour of striking a ball would provide mastery, but I would be ready to assume that it would help your skill.