What makes you think he can't find some sort of happiness in, say, playing for a team like Brooklyn or Sacramento, playing for a young team that needs leadership? We have no real idea how these guys are wired.
Because those teams suck. Winning is more enjoyable than losing.
And saying you have no idea how these guys are wired is ignoring previous decisions they've made. He went out of his way to sign in Golden State. He told the organization he wanted to be there before they even had the cap space to sign him. Now maybe he has changed and values different things. But until he does anything to verify that, I'm going to stick to his past history of decisions he's made and what he's valued in the past as the best model of predicting what he might do.
And again, I may be wrong, but we won't know until he makes a decision.