It's hard to learn math, history, science, and literature running around playing. Changing school to be what kids want compromises the school. Kids don't want to study.

Boys may have a harder time staying still and paying attention, but that isn't just a school thing. Doing any sort of research for any sort of theoretical learning in life requires those same things. You'll never get to fulfill your every desire in life. Learning the discipline to control yourself now and have fun later is just as important a life skill to learn as any. Just because something is hard doesn't mean it's not worth doing.