Steve Jobs was friends in college with Robert Friedland[0], a mining billionaire (self-made, his story is fascinating), and it is rumored that Jobs learned some of his persuasion skills from observing Friedland. There are some videos of Friendland online, and though he is a bit of a huckster, he is a great speaker.
A self-made mining billionaire? Indeed that is fascinating. He must have been working really hard down in those mines to make that much without any help.
You could play this game with virtually any billionaire[0]. Everyone who gets that wealthy does it by leveraging other people. That's the whole point of forming a company. Self made in this context obviously means did it from the ground up.
The fact is, he started some speculative mining ventures that found massive mineral deposits. That's self made.
[0]: Marc Rich might be an exception. His company was basically him and a telephone for a while, but he was still leveraging his relationships with other commodities firms, which are themselves massive employers.
[0]: https://en.wikipedia.org/wiki/Robert_Friedland