> There's plenty of demand for tech workers who aren't expected to work insane hours, and can have time for kids and hobbies.
Even without insane hours and ordinary 40 hours, the problem is: out of 24 hours, you lose 9 hours to sleep (8 hours + 0.5/0.5 to fall asleep and wake up), 3 hours for eating (including making the food and cleaning up), 8 hours to work, 1 hour to commute... that leaves you with just three hours a day of theoretically "free" time, of which you'll set aside at least an hour to decompress from work, one hour to interacting with your spouse - and now you're left with one hour a day of actually "free" time.
No way to fit hobbies or even any meaningful social activity in there and any unplanned events (e.g. a traffic jam, something comes up at work so you need to stay a bit late) completely throw everything off.