3) There are some professions, such as lawyer, where you won't last long unless you have specific knowledge, which you may get only studying in the university.
4) There exist huge competition for some very prestigious jobs. Employers will, first of all, look at those who studied in the university.
5) By studying in the university you can proceed deaper the subject you're aiming for. And if you are going to set up a business or create some unique product, you will have clearer idea of what you have to do.