Hardly. There are plenty of people who are as smart or smarter than Elon Musk who haven’t struck it big. Given his net worth there are huge numbers of people like that who haven’t struck it big.

I’m just pointing out that accomplishing what he’s accomplished probably means he isn’t dumb. Not in certain fields of expertise, at any rate. I’m only arguing that the “ha ha, he’s a moron!” reactions here are not particularly plausible.