Yeah, that of course plays a huge role. Certain stars tend to be less agressive on D because they don't want to be in foul trouble. Once he learns that he can impact the game on defense just the way he impacts the game offensively he'll be a much more complete player.
Agree. He will only be at his peak if he takes defense seriously. I don't want him to become the next Amare, Melo or Durant where he's very one dimensional. I think he has the potential to be more of a PF version of Lebron do everything type if he works hard on his game.