The answer is SpaceX is being held at a low headcount strategically. Turns out, if you‘re an engineering company you don‘t need a lot of top brass, DEI committees, artificial diversity hires, inner-company minority peer groups and bloated HR departments. You instead reduce friction as much as possible.

I hate to say it, but maybe Musk is onto something. SpaceX hires top people who work a lot, efficiently. This seems to work for them. Duh, I guess?