[achievingApathy]

I think what you're saying is that an example is not generally proof that just anyone can. It goes a long way in disproving that its impossible, however. There could be a large amount of luck involved in everything and we just don't know it.

[amelius]

Another way to look at it, is as a scientific experiment, which is by definition falsifiable. "X became a multi-billionaire by using only skills" is hardly a falsifiable statement.