This is a tiny subset of cases. You need to make this clear up front if you are trying to limit the discussion to only fast-moving startups. For many people, th

This is a tiny subset of cases. You need to make this clear up front if you are trying to limit the discussion to only fast-moving startups. For many people, that environment would be a miserable existence for many of the same reasons that this specific case benefits from everybody being in the office. We should really not try to optimize or generalize for this specialized case - it would hurt everybody. It would be like punishing everybody who doesn't work overtime - i.e. you're describing an exception that people, if they truly want to, are free to willingly engage in. But it's irrelevant to the broader discussion of work-life balance in a healthy society.