Well, he did start a rocket company without knowing very much about rockets. Most people I know that make it into the millionaire/billionaire club live their lives trying to stay there. Musk risked it all. If it wasn't for him we wouldn't have re-usable rockets. I think it's clear he's causing a whole industry to change. They're probably neck and neck with GM on their self-driving efforts (behind Waymo, though).
I think the whole world should be grateful for the guy. Yea he might get excited and overstate things, but his accomplishments dwarf any of the naysaying IMO. Plus, when it comes to manufacturing. They started from scratch competing with massive companies that have done this for decades in one of the most capital intensive markets existing today.
Granted, it's not just him doing it himself. But what he's achieved is head and shoulders above most entrepreneurs.
Has anyone else driven the Model 3/S/X?