Earlier quoted context omitted.
He's still relatively young, and likely realises the near absolute power he holds over one of the largest companies in the world is not something he can get back once he gives it up. Also Gates, to put it in very uncharitable terms, has shown that it doesn't matter if you're seen as a hated, greedy CEO as long as you do enough philanthropy later in life.
What would Bill Gates have to do to finally shed his reputation as a business man? Honestly, Gates seems like a pretty good guy from interviews he’s given and he’s doing something good with his money.
I don't think he has to shed his reputation as a business man, if "being a business man" means maximising profits. He was great at that, and his activities were lawful, at least up to the point when he was judged to have acted in violation of anti-trust laws in trying to parlay one monopoly into another.
What he'd have to do to stem my disappointment in him as a leading fellow of the software development community of his day, is to acknowledge that after already earning his first 10 billion from DOS, Office and Windows, he actively worked to impede the progress of the internet, and hold back a generation of young non-millionaire developers, by "cutting off Netscape's air supply".