I don't think you know what day of the week it is friend.
A study by the Standford CS department shows that total productivity sharply declines after 50 hours of work in a week. Mistakes get made, inefficiencies are introduced. I only shoot for 60 because I can typically vary the work and disperse it over the weekends, which helps.
https://cs.stanford.edu/people/eroberts/cs201/projects/crunc...
Also my fiancee supports me in my efforts and gives me an extra reason to go to work in the morning. She makes me more productive and provides much needed support and motivation (we largely depend on my salary at the moment). Now sure if I had no desire for a family or friends or life experiences and became some kind of solitary engineer-warrior-monk, and was able to do so without falling into severe depression, maybe I'd be marginally better, but the difference would not be nearly enough to warrant the sacrifice. Even Elon Musk spends some (albeit limited) time with his family and talks about how he's had to tone it down recently (from getting 4 hours a night to 6 hours), and recently tweeted about having a fun night mixing wine and ambien. I have no doubt he works harder than me, but even he has a family and down time.
Also, I work at a big traditional defense contractor. Large companies are hardly monolithic. Some programs suck and are staffed by lazy/ineffective engineers, but my program's customer is quite satisfied at the moment, as are other programs' customers. That's why we get business, we do have competition that will take it from us if we don't deliver. You can't paint 100,000+ employees with one brush, and trying to do so makes you sound unintelligent. Correspondingly your statement "What the issue is at traditional companies doesn't matter, the fact is that they suck and they cultivate lazy engineering." makes it clear that you're not interested in discussing the issue and more interested in validating your own beliefs, which you have no evidence for beyond having "read some interviews". Once again, that diminishes your credibility.
And I don't give a damn what you think about my 3rd grade drawings (fyi you clearly rushed through reading my post and missed the phrasing, I don't have a 3rd grade kid). It was meant to support the statement that I actually am passionate about space tech and would love to work on what SpaceX works on, nothing more.
And warm-fuzzies are clearly something you need more of in your life. Tesla will probably help save the world, but they're hardly the only force out there, or even the decisive force when it comes to combating climate change. Even if they fold I don't think you have too much to worry about.
I've been polite up to this point, but I'll be blunt: You sound like a 14 year old who's sole knowledge of the world comes from blog posts. Which is fine, but don't expect anyone to take you seriously. You have to earn that when you're in a room of strangers (which is what this forum largely is), and you've only done the opposite.