I don’t see how “tech” is limited to software. While your case might be made for software, according to many accounts Musk is a strong driver on the hardware side. For instance, I’ve read the Tesla and SpaceX books by Eric Berger, which are much more focused on technical things compared to the more mainstream books. And while Musk is not in the trenches with a screwdriver, he’s not faking it either.

To be honest, I’m actually interested in this hypothesis: is he legitimately skilled/knowledgeable, or is he indeed faking it? And for either side I would like to see evidence. This question is interesting to me because some of his companies have made substantial contributions to pushing the frontier of technology (reusable landing, high launch cadence, electric cars, energy).

If he is really faking it, that might even be good, because the success of his companies might be replicable and could continue without him. But what if he is not?