Seems to me that teenagers in general have a very predictable tendency toward staying up late. Going to bed in the evening isn't a solution to healthy sleep sc

Seems to me that teenagers in general have a very predictable tendency toward staying up late. Going to bed in the evening isn't a solution to healthy sleep schedules: it's an accommodation to waking up in the morning. Why do teenagers need to be waking up early? Since we know that most struggle accommodating an early rise, why not, as a society, accommodate a late rise?