Truth be told, every single person can only give so much of their brain or body to a job in long term. You may think you're working 14 hours a day regularly, but it's usually 2-3 hours a day of productive use of time, rest can be busy work, at least in the tech industry. I don't mean there can never be times when you actually work for 14 hours daily, but it'll burn you out so quickly that you'll end up taking longer breaks, quitting or just becoming toxic in other areas of your life. Not worth it.

It's like induced demand. Wider roads don't necessarily mean faster traffic. More working hours doesn't mean better productive use of time. That's why we see reports telling how 4 day work weeks actually improved productivity. Less time for BS.