When I was in college more than 50% of the courses existed for historical reasons only; not that I never used anything, ever, from it but some continue to exist

When I was in college more than 50% of the courses existed for historical reasons only; not that I never used anything, ever, from it but some continue to exist today, decades later. Higher level mathematics in computer science is an exception in the life after college, so teaching it to everyone just because 1 in a million may ever used it is a waste of time, money and brain cells. Note: back then in Eastern Europe some college-level math was done in the last 2 years of high school, so what is considered "higher level mathematics" is a subjective term, please take that into consideration when reading the paragraph above.