If Tesla, SpaceX, Neuralink, TheBoringScam etc. disappeared overnight, consumers quality of life would not be affected one bit. It's very similar to Ferrari or Tiffany&CO going under..it's meh. Contrast that with Exxon, Saudi Aramco, Google, Microsoft, Amazon, Walmart, Costco, VW, Daimler...
There are unknown private companies such as Vitol selling 300bn dollars worth of products per year. Do you know Vitol?
No? Well why would you...the CEO isn't constantly shitposting on twitter.
Musk is like Donald Trump, Bill Clinton, Hillary Clinton, Joe Biden etc. What you call success is what people who don't fall for cult of personality call "being a BS-seller". Convincing fans and supporters that they are some sort of hero against dark forces