I've heard "I learned more at X than at college" multiple times, it's become a refrain. But public university courses are pretty intellectually intensive, or at least provide good opportunities to be so; I wonder if people who say these implicitly qualify it with "that I valued / that I found was useful to my (intended) career"
Some of them view it this way, and end up being excellent lecturers. They get laid off for not publishing often enough or successfully enough. Like the one statistics professor I've had that was worth a damn.
I have a 4 year degree from a state school now, and even though I missed out on some of the dorm shenanigans/networking/etc, I’m doing just fine now. And I never had any student loans to worry about. (Admittedly, my parents did help pay for my degree, but $2500/semester at a state university is very, very reasonable.)