I read the SI article over the weekend, I "get it" now - LeBron wants to be Magic and not Jordan, he wants to distribute the ball and watch his teammates score and he was never going to have that in Cleveland. Pat Riley pitched it where D-Wade was Jordan, LeBron was Magic and Bosh was Garnett.
I still think it's a cop-out for LeBron. The reason these dudes cry when they win a championship is because they struggle with their teams through the tough times, then finally turn a corner win.
Bosh is a skilled player, but isn't big enough to play with the NBA big men, and after watching him in Toronto in the tough times, he seems to give up and get frustrated rather than elevating his game.