Musk's contributions can pretty much be summed up by "already had a lot of money" and "hired smart people". Contrast w/ the founding of Microsoft or Apple, in which the founders were the actual people creating their first products from scratch.
Musk is certainly a big-idea person, but I think he is a prime example of somebody who was in the right place to get lucky at the top of the dotcom boom, which in turn rested on him being from an already wealthy family. His foray into Twitter, "how to solve the Ukraine-Russia war", and the Thai cave rescue suggest he's not quite the genius his fans make him out to be.