I worked in early stage startups. There is absolutely a strong sense of a small, intimate team working hard for a common goal.
Nobody is claiming or treating it as "a job". When the founders were asking the whole team to regularly work entire weekends before launch, nobody said it was "a job".
> If the market were rational [...]
You keep repeating that, but it is a sort of truism that doesn't stand up to even cursory scrutiny.
High-acceleration startups are, by definition, trying to reach ambitious goals quickly. They're not about providing a nice work-life balance to their members.
If a startup founder pitched a VC with "we all have great work-life balance, and it's our goal to stay this way!" she wouldn't get a dime.
Startups are intense, and have intense expectations.
The reality is that startups need people to work harder, sacrifice more of their lives, for a few years, in a hope of a big payout, which is where the equity component comes in.
This formula worked well in SV for decades, but recently the VCs and founders got greedy, and said "hey, why should we reserve millions of dollars for our early employees, if they'll work just as hard for empty promises of such amounts instead"?
That's the current situation, as reflected in this thread.