Startups are trying to come from almost nothing to billions in a short time span. Additionally, if they're in a market space that is not just some stupid idea/f

Startups are trying to come from almost nothing to billions in a short time span. Additionally, if they're in a market space that is not just some stupid idea/fantasy, there will be an intense competition from other startups trying to capture the same market (as software markets are largely winner-take-all). This creates large incentives for founders to turn it into a death march for the staff - and conversely, there's little incentive to keep staff happy with their work-life balance (because if we do that, the company may not survive next 24-36 months, and then who cares about happy staff).