Brutal hours produce burnout, and I suppose the idea when doing a startup is to work hours that you know will eventually burn you out badly, but just hope that your company makes the big time before then. But in a bunch of ways, especially if you're going for a lifestyle business, that doesn't seem advisable.
Not everything has to be sustainable. Know the differences, know your limits, be judicious about what you sacrifice for, have good reason for what you do. It's not that sprinting is always bad, it's that trying to sprint 3 miles is bad.
10 hours working in a corporation are brutal. You might not even be satiated working 10 hours on something your passionate about.
That's not really caring that you're working too hard, or trying to fix the problem that you're working too hard. That sounds like trying to make you less angry about working too hard.
21%? I would have thought the number was less than 10%.
I would say that 95% of companies take actions to increase stress caused by excessive work by letting people overpromise on deliverables.
Seriously, though, a lot of companies may discourage people working longer than 9-5, which accomplishes the same goal but would be "uncaring" by your definition.
