I think that's because those majors appeal to more people. It makes sense that the most sought-after jobs are the ones that appeal to the least amount of people.

My completely uneducated opinion is that middle and high school should do what colleges are supposed to: prepare students for the real world with useful skills. Teach them how to teach themselves. Then, when they go to college, they can focus on a subject they really want and not treat it like Camp College™.