I would say that the one redeeming quality of Elon Musk (in a sea of otherwise awful personality traits) is that for at least Tesla and SpaceX, that he was interested in running those companies primarily to produce a product. Like that was the primary focus and raison d'être of both of those companies, especially SpaceX I think. This is in opposition to the usual "the only point of a business is to make money" ethos that so permeates neoliberal capitalism that we hardly even notice it anymore. The latter is dysfunctional, inhuman, and ultimately bad for business.

I don't know if he still takes that approach. In fact, I kind of doubt he ever really did, but he certainly projected that image publicly, and most importantly to workers of those companies - whether he "really believed" it I guess is a moot point.

When you take the "businesses exist to return a profit to shareholders" approach you're always going to focus on leadership that has a track record of doing that, even if that excludes building a good product or for that matter even the long-term viability of the business. Thus, you see these CEO hires that don't seem to make sense - most of us unconsciously still think of businesses as things created to make a thing or do a specific thing, because that's a natural thing to believe.

Anyway I think you can attribute some of the success of both to this, as well as Musk's public image at least ca 2008-2018 or so.