Yes, all of that is true. It is also true that they have organizations can and will get rid of people that are too toxic to work there. Sometimes the system even works! I've known of several people who, despite being brilliant engineers, repeatedly said the kinds of things you just can't say in polite company and so were eventually let go.

Yes, it took too long.

The system (at two separate companies) eventually worked.

That's not the only reason companies will get rid of people of course, because they are ultimately capital-dedicated authoritarian organizations. But it is a reason, which is my point.

And across the industry there is something akin to a floor of acceptable behavior. I cannot go into the office nude. I'm generally not allowed to abuse the other employees (however the higher up you are/the more important you are, the harder it gets to remove you, and it always relies on reporting).

There is a floor, and it's in practice lower than I'd like, but it exists.