The individual companies likely not, but it's not like those are the only companies doing these things. Human achievements come from standing on the shoulders of giants, not from individual supermen - we see this through history time and time again, with so many groundbreaking discoveries being independantly made at about the same time simply because previous discoveries had made them possible.

This is not to diminish the minds of those who discovered them, of course, but it is to _temper_ the hero worship. What SpaceX is doing is not enabled by an individual superman, as the comparison with Bruce Wayne or Tony Stark would suggest, but by allocating resources to something made possible by the work of hundreds of thousands of people.

Remove one man from the picture there and that work still exists. Just as other companies are doing the same things _now_, because they are possible _now_, they would be with any individual person removed, regardless of who that person was. The details would be different - without Musk, it would be some other company doing this, without the lead designer, the things themselves would look different, without the lead engineer some components would make different tradeoffs, et cetera - but without Elon Musk, everyone working at SpaceX would still exist, everyone working at Tesla would still exist, and everyone working at other companies doing the exact same things would still exist. We could be a little behind, for sure, the hero worship could well have translated into inspiration for some, or even a lot of, people, but that doesn't make the man himself necessary for any of those things.

I worry that saying things like this comes across as attacking the man, which it absolutely isn't. Without Einstein, we would still have made the same realisations, collectively, eventually. Other people were working on the same things at the same time. Without Edison, we would still have the electric lightbulb, entirely likely invented by, hm, who...

Oh right, Tesla. The company itself is named after one of the most blatant examples of this phenomenon. Musk may even understand - he certainly does, he's clearly not dumb - that he isn't a unique superman. That doesn't make him "bad", but it does mean that we really don't need to waste thousands of words on defending his obviously harmful actions under the theory of "we have to let him do and say bad things or he might stop doing good things too."