It is fair, however, people who are too big too fail have a lot of leeway after their brain goes. I think it could be an explanation as well. But we indeed do not know; don't have nor want billions. People like that definitely live in another world.

I don't see any evidence that Elon's brain is "going" and in fact he's literally more successful than ever - and more than almost anyone in history. Which isn't me trying to kiss his ass but rather just a statement of facts that anyone can see by looking at the net worth scoreboard. If we saw any evidence of senility or brain rot or whatever people want to accuse him of, then sure, maybe there can be room for "maybe Elon is starting to make truly idiotic business decisions".

I do agree wealth does cause brain rot and even the people trying to be most self-aware about it still fall victim to their bubbles and egos. I think Elon shows this plenty is many aspects of his life, but business is not one of them.