Science says teens need more sleep. So why is it so hard to start school later?

Teens brains aren't wired to go to bed that early. It genuinely physiologically harder for the to fall asleep at the hours they are required to fall asleep to get adequate rest for school. Sure some kids will be perfectly fine going to bed at 10 and they'll immediately fall asleep, wake up at 6 and be fine but a lot of teens and I mean a lot find that to be a Herculean task.

I speak from experience, to this day I cannot fall asleep before midnight unless I've been worked ragged and even then it's difficult. When I was a teen I'd try and get enough sleep I really would but if I was to fall asleep at 10 I'd have to be in bed and trying to fall asleep by atleast 9 but probably 8 and even then there was no guarantees. On average throughout all of highschool I probably got 4 hrs per night.