Musk’s wealth isn’t the best indicator of his intelligence. It’s more circumstantial evidence at best.

“corporations with those who own them.”

This veers towards been an non sequitur. The claim isn’t that Musk is the corporation or that he is responsible for every decision. However, he is one of the (and probably THE) prominent voices in his companies and his decisions can massively impact the company’s trajectory. One success is luck, multiple successes suggests there’s a lot more than luck at play.