I think you will find that people like to generalize everything to black and white so things make sense when in reality there are much more complex things at play, not to mention that humans are not designed to fit one mold. Somehow this is a commonly accepted truth when it comes to baby with “all babies are different” but when focus shifts to teens and adults we are supposed to be neatly organized into cstegories and labels. Pleeeeeeeease...
My point being, your situation is not necessary comparable to others. Case in point, as a child I had a difficult time falling asleep at night without screens. I woke up late and was always tired in the morning. You might attribute this to a number of some factors we probably don’t have time to discuss here. Now, as a teenager I was able to fall asleep like a rock on most days but was still tired the next day in class. I can’t tell ya how many times I’ve heard “that lazy guy” Label being applied to myself and others who shared this trait because imo it’s too convenient to label someone rather than trying to understand the underlying issues.
In any case, I tend to agree that school most definitely starts too early for a growing human being whose development takes place at night and specifically mostly during slee when body is at rest. Is it a surprise then that a developing body requires more sleep? Circadian cycles or not, kids should probably start school at a later time. Now, whether society can accept this and modify adult schedules around new findings is a question not easily answered. I suspect for this to happen, society as a whole will need to move away from 9-5 or at least become more remote and or flexible.