He is cunning to a tee.

“Hey let’s livestream me playing Path of Exile after saying I’m the best in the world, with uncensored live chat from thousands of pseudanonymous gamers with actual experience.”

He’s good at creating the illusion that he’s a genius on a subject for the duration of an informal conversation. Steering away from topics he doesn’t understand, forging signals of deep understanding by mimicking the speech patterns of an expert who struggles to put things in lay man’s terms while namedropping memorized keywords, etc.

If you look at Path of Exile and the Cybertruck, it’s clear that Elon doesn’t know when his promises are unrealistic in a way that will make him look like an idiot. I think he has handlers, not just at SpaceX but everywhere, and those handlers are the real talent. Those handlers know how to cultivate experts that are actually good at their jobs to quietly do the work that Elon takes credit for and how to coach them to make Elon feel good about this arrangement most of the time.