I think it's more like him just trying to maximize his earnings. He has a very very rare talent, which people pay a lot for, and he's trying to cash that in. We see it all the time in sports. Guys hold out and pass up money that you or I could take and live on for the rest of our lives. They could to but they still want to squeeze as much out of their careers as they can. Their careers are also incredibly short compared to regular working people.
Whether he made the right decision in terms of maxing that career earnings, time will tell