Later school start times are associated with more sleep and better performance
As a kid I remember waking up at 7 and heading to class which was starting at 8. I was half awake up until about 10 in the morning, I don't know how I was making it to school in one piece (school was within walking distance and was about 15 minutes from home). Also, in the winter at 7 it was still dark and cold I still remember the a magnetic force I had to fight away from the warm cozy bed. That was me at the time. A group of kids didn't seem to have this problem at all,  so this early sleepiness phenomena is not universal. Throughout my life I was also a night owl, my most productive and creative moments took place after dark. Recently, however, something changed. I feel much more comfortable in the morning, I even enjoy the quiet hours early in the morning until things start to hustle and bustle and enjoy and am able to go to sleep earlier.So to conclude, this is not a universal thing and this is the problem, we are all different so a one sized solution does both good and bad.