Why the hell would he come back, to what must be one of the most annoying and stressful jobs in the world, at least at this time for Microsoft. He can only lose

Why the hell would he come back, to what must be one of the most annoying and stressful jobs in the world, at least at this time for Microsoft. He can only lose, he can't win. Even if he does well, he would just have put Microsoft back on track to where it was before, and if he fails he gets a lot of grief. And why would he give up all his projects and free time, for no gain at all.