His problem is that it's a team game. Other than that...oh, wait. There's also both offense and defense. So he has two problems: he doesn't defend well and doesn't play team ball well.
Other than that...
This sounds like 60% of the league so he fits in. Amare Stoudemire (Superstar) received 2 max contracts playing the way you described.
All true, but count their rings...combined...
Heck, for a 15th spot, though, I'd try about anybody. Not sure who/if I'd cut anybody to make room for another GG experiment, though.
Especially if all he's showing is on the offensive end, and in the D-league, where we'd probably all agree he could and should average gaudy offensive numbers.