Not to disagree with the idea of their importance, but linear algebra, set theory, and formal logic are things I had not even heard of in a relatively impoveris

Not to disagree with the idea of their importance, but linear algebra, set theory, and formal logic are things I had not even heard of in a relatively impoverished public high school, much less had courses on. Hell, I had to take the AP Calculus AB twice -- not because I did poorly the first time, but because there was no other courses for me to take and I didn't want to go a year without any math before college.