(1) For students who are not majoring in mathematics, the five courses of primary school to high school and college mathematics belong to the "general mathematics course", just like "when the male is married, the female is married".
(2) However, before college, we didn't think so. Our goal is mathematicians, and we think mathematics is very interesting and beautiful.
(3) After entering the university, the cognition was subverted and the dream was shattered. So there is the phenomenon you mentioned.