Do We Need Smarter Hams?

I don't know how to pose this question(s). Should it be, "If you only need a grade of 50% to pass high school and college courses in Canada, why do you need a 70 to pass the Ham radio operator's test?" Or, is it, "If you need a 70% to pass the Ham radio exam, why do you only need 50% to pass high school and college courses." See my dilemma? I don't know which of the two conditions should concern me? Which should be adjusted? Should the ham radio test be dumbed down or academic achievement be smartened up? Opinions?