I think that there are lots of people who could do a better job than Elon Musk but they will never have the opportunity to prove it. The vast majority of people would know that calling the Thai cave diver/rescuer a 'pedo-guy' was a bad decision. Also, announcing that some funding was secured when it actually wasn't - That was a bad decision as well. To suggest that Elon Musk is irreplaceable is ridiculous. People used to say that Steve Jobs was irreplaceable but look at the Apple stock price now.