Ecause knowledge is power---and cash I people's hands. No matter where you go on this earth, either the rich (and powerful) rule or the educated---and many times they go hand in hand...
Besides, just because you look at the Internet to gain knowledge, it doesn't mean you becomes intelligent. Who is the say that the info is legit? Also, it seems that the info that is available, the more ignorant people become...It's like, there is tons of info on losing weight, tons of gyms, yet more and more people become morbidly obese...
Like Raymondo said, unis/colleges/professors/teachers are there to give stucture to the learning environment.