Elon Musk is wrong about a lot of things. I'm not sure why people keep asking him questions outside his area of expertise...
He's also resoundingly good at being a nepo-baby who got everything handed to him.
I can assure you he's not a good engineer or honest businessman.
Yeah, but that is precisely why he is asked such questions. He gives a more engaging to the Average Joe response than an expert does. It doesn't matter if the response is out to lunch.
The question you responded to was trying to figure out where his expertise didn't overlap with the intent of the people questioning him.
Dude would live a better life and leave a better legacy if he would focus more on chilling, empathy, and building rockets to get humanity to the stars
He's the richest person in the world and wastes his time with political bullshit, while he is one of the very few and privileged who have the resources at their disposal to actually attempt and support grand experiments
Without him his companies wouldn't have gotten the attention they got and the vision of self driving cars and colonizing Mars certainly got to motivation of engineers working there.
So there is some expertise.