The unfortunate reality is that people have to meet up at some point and overlap for much of the day. This is as true for an adult as for a child. I say this as a night owl myself; the world hasn’t picked our way.
I also suspect that starting at 11 AM-1 PM and going until 4-5 PM, despite being less overall time, would produce vastly better academic outcomes in high school just due to the average teenage circadian rhythm and the resulting zombification of current students. The noneducational duties of high school could be handled by letting students show up earlier as needed with breakfast/lunch provided- the structured classes would just start later.
Maybe give the early arrivers a place to take a nap while we're at it.
I totally agree that if we focused on getting kids a reasonable amount of sleep and a healthy meal or two (and hydrated!), we’d likely be able to have much better outcomes.
I was taking prescribed sleeping pills because I couldn't fall asleep and had anxiety attacks late at night if I forced it. My school started at 6 am so I got up at 5 am. It got pretty bad at some point.
My dad and grandfather both have problem sleeping early but I am worse.