Say what you will about Notch since he's become a billionaire, but he became a billionaire just by creating a game that people really really liked and being willing to sell when Microsoft came knocking. He wasn't wealthy before that and didn't seem to have ambitions as such. So, it seems there are avenues to such vast wealth that aren't so clearly, "you must f many people over and have sociopathic ambitions".

That is to say, in many ways I agree with your assessment, but let's be careful not to over-generalize.