@ossobuco,
I think you are right on all counts, Osso. I wrote back in 2007/8 or so that he could/should retire. He couldn't possibly need the money. He could return to his native state of Mississippi (?) and perhaps run for some political office, which he would probably have won. I don't know his political views but, post Katrina, he could have helped that state. But we are not into politics here.
I guess there is something in an athlete's genes that causes them to want to hang on for one more round, even if they have already enjoyed immense success.
As kids, many of us rode on merry-go-rounds. Astride painted wooden horses with names we had secretly given them. And once each time around we would stretch out as far as we could reach to try to grab a brass ring. More often then not we would fail, but we would ride around again.
At some point, at some age, we would move on.
I am sure that Spendius (from England), Lmur (Ireland), EhBeth (Canada) and Fbaezer (Mexico) can relate stories of athletes in their countries that never figured out when it was time to move on.