Both from books and from experience. The path of education will never end. The definition of success is different to everybody depending their own path. There is so much to learn not necessarily from textbook material but also how to be a better person. But as long as the function of the university is doing its best to privide what the students need, no matter what their goals are, it is still very beneficial to every individual.
People prioritize their intentions in life differently.
They must decide what is the best way to fulfill what they desire in life. Obviously, attending college is one of the various ways that people use to achieve their goal. Whether it be wanting to bring up their social status, enrich their mind with knowledge, or give feedback to the society, all the above is a personal decision. Education in school can have an impact on students to certain extend, whether or not they will contribute is up to the individual to decide. That is what establish the existence of different majors in college and technical school.