They're surely wrong, at least in some on way, but so's everyone else's opinion. These are areas which are far to complex for anybody to understand. All we really have is opinions.

At least Musk's opinions aren't just a carbon copy of whatever's popular at the time. That alone makes them at least potentially worth something. The celebrities who can only repeat what they're supposed to say to make themselves look good are the ones who should shut up. Their stated opinions are simply whatever they think will serve their popularity.