A good boss is a BS shield, that enhances productivity. I enjoyed startups when I was younger, but now I like to be focused. Fighting fires for a living can result in broad experience, but also less deep work, which can “stunt growth”. At least that’s my opinion/experience. They were also the most fulfilling, that completely disappeared 8 years of my life.

But where is the room for ambition in a large company with flat staffing? If you, completely independently, build something adding $2 million of revenue at e.g. Google, you've increased the company revenue by 0.0007%. Even hundreds of millions of dollars remain but a decimal point. The company is simply so large that even if you achieve amazing things, they're going to be largely irrelevant. So the only real avenue for ambition is climbing the ladder of hierarchy. But when that ladder doesn't exist?

One could argue that social economic systems, at scale, are functionally similar to a massive corporation operating on a flat environment. And you end up with a similar issue there. "Company" ambition doesn't really have a viable path forward, and so the optimal solution is to just coast by - and direct your ambition towards your own personal stuff. Or even set the ambition aside, and just enjoy life. At least until the consequences of everybody operating under a similar system of demotivation kicks in.