That's nice, but the only people he has to prove anything to is himself and KD. If he is going to rejoin the team, it's not to benefit the team. It's to benefit himself. He has to decide that he really does want to do the things that will benefit him in the long run like finishing school and becoming a contributing member of society. He needs to figure out that the team doesn't need him as much as he needs to be part of the team. What happens in the next few months will show which way he wants to go. It's up to him.