It's not like the stories about Carmack make him out to be a saintly, fuzzy human but I will definitely give him credit for standing firm on some big ideals/principals, even if I don't share them.
I guess I just hope that you can (a) be really good at your work - like -genius good - and also (b) a decent, empathetic human being.
Wishful thinking? maybe, but I don't really want to be top-level successful if you've gotta choose.