This is off a bit, he's pretty technical, BS in Electrical Engineering and CS from Princeton. And his pre Amazon jobs were managing technical projects at D.E. Shaw and Bankers Trust.
Not sure where some of these ideas even come from. I constantly see some version of "Musk isn't really engineer" on here as well. I guess having credible degree's and starting billion dollar++ tech companies doesn't quite cut it for the harsh critiques on Hackernews.