How and why someone will work 80 hours a week? Don't they have families, friends, sport, or a hobby? Why is it necessary?
I've also seen this "culture" of "we're one big family" in startups, which just feels weird and forced.
Yeah no thanks.
When you're 25 and have no ties and no responsibilities, working 12-15 hours a day isn't the impossibility that it is when you are 35 and have a wife, kids, your own house, and social obligations.