Can we please stop saying that the CEO of a company did anything but lead a company (not to downplay the difficulty of leading a company). Musk certainly did not design rockets that land themselves. I highly doubt that he could even write down (let alone solve) the main important equations when asked. It's funny how some execs are attributed with doing everything (Jobs and Musk are the main ones), while nobody would say Adani dug up coal from the ground.
Watching even 1 video of an everyday astronaut interview with Musk makes it completely obvious you are completely wrong. And so do tonnes of testimonials on quora from spacex employees.
Musk is the chief engineer of spacex rockets. He's not just a CEO.
Do a little research before making comments like this.