Well what reason wouldn't be selfish or egotistical? If he went pro, wouldn't that be selfish? Leaving his team behind so he can go get paid? Sounds like he's in a lose-lose situation with you, here.
And nevermind all that, thinking of ones self does not necessarily equate to selfish. Shouldn't he do what is best for him, in his opinion? Isn't that up to him? Not you?
Maybe you want him gone so you don't have to listen to ESPN ride USC's jock all season. Maybe you want him gone so that a potential roadblock to Alabama's next NC is out of the way? Either way, those aren't valid reasons. The kid wants to stay. So what? I'd love to be back in college for another year, especially if I were the big man on campus in Southern California. Sounds incredible. Yes, please.