I think an-whatever has a very crappy view of what University is. Now, I understand that there are certain state schools that offer no real challenge to a student then repeat the book. If that is the university you are going too, then I suggest you partake in more rigorous one o one with the professors in your department. However, there exist real university that encourage independent study and test that require students to take the information they learned and expand upon it during the test. An-whatever is completely correct about everything he says if your only goal for going to college is to have a job. However, I believe that if that is your end goal, then you probably should major in accounting or computer information systems, you know something where you know you'll get a return.
A university is about expanding who you are as a person by forcefully putting you into a vast myriad of different people while forcing you to listen to older and more experienced people. I often see this in young math students. They can read Hungerford abstract algebra, and then complain that the questions have nothing to do with the chapter. Then they come to me and I point them to a chapter and show them how the word domain implies it's already a group -_-.
Point being is that 99% of the people I come across CANNOT understand a text completely without reference. Even I, as a professional mathematician find new details in an intro text that I missed as student, a grad student, and using the text as a teacher. It takes experience, interaction with more skilled people, and most importantly a complete openness to new ideas to really succeed in whatever you do in life.
You see, university is NOT there to teach you a skill or get you a job. It is there to EDUCATE you. I know people go there for a job, but that doesn't change the purpose. I find the people who are worse at their job were the same people who went to college for the job, not because they were interested in that field at a fundamental level.
When you go to the university, you are paying for the privilege of the advice of people who have much more experience in your field than you can ever hope to find anywhere else. You are paying for an experience. You are paying for a challenge. You are paying for a new outlook and a refinement of skills and insight. You are paying for the opportunity to make connections. You are paying to find out what you really enjoy in life that isn't manual labor.
Bottom line. If you value more over education, then yeah that money is a waste. Otherwise, then you cannot never replace a professor with the knowledge and experience to guide you where you want to go.
(Side note, there are people who can make it on their own, but they are rare. They tend to have a key eye for self-criticism and pay attention to details every step of the way. Most kids are not that way.)