I don't find these claims credible. I have listen to him talk about numerous subjects I have some knowledge of and it does not sound like he is just throwing out buzzwords. You can see this discussion he was of the Raptor engine: https://www.youtube.com/watch?v=E7MQb9Y4FAE
That isn't just random buzzwords but quite detailed explanations of challenges developing a high performance rocket engine. I would challenge you to point to other CEOs we similar in depth knowledge who don't have a degree in the subject matter.
Remember Elon Musk was the chief designer of the Falcon 1 rocket. The first rocket SpaceX launched. You cannot fill that role if all you are capable of is throwing around buzzwords. I linked to this article before: https://erik-engheim.medium.com/is-elon-musk-just-a-sales-guy-9d3eb7a1b49c
In it I cite several well known experts who have worked with Elon Musk and who can vouch for his competency and insight.
I suspect you simple hear and see what you want to see because you have such a negative bias against Elon Musk. I don't like Elon Musk as a person either, but I can separate my personal dislike of the man from judgement of his technical skills.
That somebody can get as far as him on having bold vision alone simply isn't a credible explanation for SpaceX success. They have designed and built rockets in a fraction of the time that other companies do. How exactly do you achieve that by merely having a bold vision?
If it was that simply to bring about success, then something like Falcon 9 would have happened long time ago. The rocket industry is a whole graveyard of bold visions which never went anywhere.
How do you explain that Jeff Bezos with an equally bold vision, more money and more time, has not achieved a fraction of what SpaceX has done in less time and with less money?