I get the point they're making, and I agree with most of the piece, but I'm not sure I'd frame it as Musk's "mistakes," because he literally won the game. He became the richest person on earth. By our society's standards, that's like the very definition of success.
Our economy is like quidditch. There are all these rules for complicated gameplay, but it doesn't actually matter, because catching the snitch is the entire game. Musk is very, very bad at all the parts of the economy except for being a charlatan and a liar, which is capitalism's version of the seeker. Somehow, he's very good at that, and so he wins, even though he has literally no idea how to do anything else.
edit: fix typo!
edit2: since this struck a chord, here's my theory of Elon Musk. Tl;dr: I think his success comes from offering magical technical solutions to our political and social problems, allowing us to continue living an untenable status quo.