I was overscheduled in high school and constantly sleep deprived from doing too much. However, shifting the school day forward 1 hour or 2 would not have helped me since it would have just shifted my whole day forward 1-2 hours, as I was completely 'booked' with sports/homework. I think another problem is that a lot of people plan for a certain amount of sleep, but then stay up late due to devices, which is a new, modern problem that I think is actually very severe given the addictiveness of apps. Judging other commenters here, I am pessimistic about people's ability to self-delude themselves into thinking they or their kids don't have a screen problem, and just need the schedule to be shifted forward.