Attending university is unbelievably useful, but it's not really because of the subjects that you take. I can't remember half the things I learned in class, but my persisting friend groups and life opportunities can all be traced back to my time in university. (Which isn't to say that the subjects were useless; they provided a solid foundation in math and computer science. But to say they prepared me to become a professional programmer would be a baldfaced lie (conveniently, a lie that my first employer seemed to believe without me needing to tell it)).