And you'd be wrong.
Many big four year universities are composed mainly of upper middle class suburban kids with whites and asian kids over-represented. Some work a few hours here and there, but the majority don't and get beer money from mom and dad. The introductory classes common in the first four years happen in lecture halls of 250-400 students; the actual classes are taught in what are called sections, run by students working towards Ph.D.'s, often Master's, and sometimes B.A.'s. They ain't all like this, but most I've been at bear a pretty healthy resemblence.
Community colleges vary a lot by state, which is why I think some folks have a very warped opinion of them. In California, they're very common, with a sizable number of any big school's graduating class being comprised of transfer students. For every student who's at a community college because they blew off high school, you have a mom who's there to get a degree while raising a family. You have a vet just back from five years of military service. You have folks not long in this country who are working to improve their English while also starting up their higher education. You have students like this at most four year schools, but they're in a small minority, rather than the norm.
Classes are often taught by Ph.D.'s who have the qualifications to teach at four year universities but prefer to teach at community colleges. They'd rather avoid the lifelong pursuit of grant money and research focus and would instead prefer to be actual teachers. Most transfer students you talk to, if you ask them after they graduate who their best teachers were and they'll usually list a few from their community college.
Don't assume that your way is the best way because it's the way you took and it made you happy. There are a whole lot of ways to getting an education and different environments suit different people in different ways. Most folks I know who went the community college route liked it. Some didn't. But if you haven't gone down that path, it's kind of hard to judge.