Why ‘analyze’ motive or reason? It was his decision; period.
It all boils down to that it's none of your business...period.
Steve Jobs made his decision. He no doubt had the best medical advice that money could buy. But wait...there is a FReeper named SaraJohnson that could have shed new light on everything that was told to Steve Jobs and could have saved him.
do I need the tag? ... really?