It would, but people start panicking because they don't want their six year old standing alone on a deserted street corner in the dark waiting for a school bus. Seattle changed it to do that last year, but honestly what the fuck makes sense about a 7am school start time for anyone? In Australia I didn't know anyone who started school before 8.30am, ever. And that start time was basically consistent for 12 years of schooling, public, private, elementary, high school, whatever. It is like discovering aliens to see how the US school system is arranged.

The problem is that whether you're an "early bird" or "night owl" is a matter of biology, not how early or late you choose to wake up (https://www.livescience.com/16334-night-owls-early-birds-sle...).

Because of the way school and work schedules are structured, you're right that it can give you an edge to be a morning person (I'm fortunate enough to be one). However, waking up early doesn't make a night owl an early bird - it makes them tired. The fact that people are split along these lines makes it questionable to enforce schedules that suit part of the population but leave the remainder strained and underutilized.