Yes, it seems weird that people fixate on it. Not like he left for an extra $10k or $20k. I would have left too if I was in his position and I would have no regrets about it either.
He's in a position that he can play professional basketball somewhere until his 30s while his money grows and then not have to worry about a career post basketball. He might still need to work a little to supplement his income, but he can be picky what he does and do something he truly enjoys. A pretty envious position to be in.