What? religion has been doing that for thousands of years.

Indeed. My point is that we haven't matured to the point of respecting our children enough to not mutilate them, which is a far more basic accomplishment than respecting their psychological needs. We force teenagers to adhere to the sleep schedules of adults despite numerous studies indicating doing so damages their health and academic performance. There are a lot of steps between where we are now and a society that will condemn us as barbarians for not providing boys extra PE.