I'll push this one step further: why is our entire society built around the idea that sleep literally doesn't matter? - Elementary school starting so early all the kids are half asleep in class. - College + Sleep? Not gonna happen. - 24 hour construction in certain part of NYC, check! - Most cities quiet hours are very precisely 8 hours. Hope your days start at 6:30/7:00 and you're falling asleep precisely at 11pm, a…
The primary purpose of K-12 education these days is to keep kids locked up so their parents can go to work. If Mom and Dad have to be at work at 8, as is often the case, the kids have to be at school before 8. Teenagers, who naturally sleep in later than younger kids, would be better served starting school at 9, but because our society still infantilizes teenagers and young adults, we can't systemically trust them to fend for themselves in the mornings.
This isn't to say that K-12 schools are entirely unconcerned with actual education, but it has to accomplish this goal within the constraint of keeping children locked up.