Could you expand that more? Like what meaningful work did your acquaintances say Musk did for SpaceX and what valuable engineering work did they think he was capable of doing?
Maybe Musk socially engineered a kind of nerd reputational ant mill https://en.wikipedia.org/wiki/Ant_mill where everyone who works in the aerospace industry knows several current and former senior engineers at SpaceX, none of whom agree with the assessment that Musk has done no meaningful work for SpaceX, or is a poor engineer incapable of valuable work.
I know he had pocket emeralds when he was a teenager and he bought twitter and made a lot of stupid tweets, but those things don't take much time, maybe in his other time he did amazing things.