There are many non-professional courses in universities, such as taking a bunch of courses, some of which are very unpopular and may not be available for a lifetime, but universities do take this course. If you are interested in elective courses, it doesn't hurt to listen. They are all rich in knowledge. If you don't want to hear it. I don't think there is anything wrong with not attending these unimportant classes.
After all, we are here to learn things in college. If what we need to take is meaningless to us and we just waste time sitting there, then we might as well use them to do something meaningful. For example, it would be much better to listen to the courses we are interested in, or do a part-time job and go to the city to see which companies we can enter after graduation. These things are much better than sitting there wasting our time.
You can't generalize everything. Parents always tell us that we should listen carefully and study hard at school, and never skip class, otherwise we will be bad children and not good students. In fact, we are not good students, because we may not skip classes several times. We just spend the time wasted in meaningless classes on other more meaningful things.