Wolfram has done a lot of valuable things that are probably impossible for someone without a very strong sense of ego. His willingness to pursue iconoclastic threads of intellectual pursuit (New Kind of Science, Physics Project, Public CEOing, etc.) almost certainly goes hand in hand with a rare form of self-assuredness. It takes all sorts in this world.

And trust me. Anyone who goes into business with Wolfram knows what they're getting into. Or at least has no excuse for their ignorance. He's an extremely public figure. You can watch him manage his company on YouTube, if you're so inclined.