Secondly, I think Steve Jobs would have been much worse off if he had stepped down as CEO.
Steve Jobs needed Apple as much as Apple needed Steve Jobs.
How do you know? He is reported to have spent a lot of time with his family. It is, in fact, quite possible to lead a very busy lifestyle and still remain healthy. I'm sure many of us here do exactly that.
I have no clue whether these were things Jobs did, but he was hardly starting a company here.