I can’t speak for the OP, but had I not lived in a dorm, I would have missed out, big time. Hell, I probably would have ended up flunking out and having a nervous breakdown.
I started college as a shy, introverted loner who only thought about physics and math (and Monty Python), and was clueless when it came to the opposite sex. I was also completely unsure of myself and had little confidence about working without direct instruction (as you normally have all the way through high school). Had I been living at home (or living by myself in an apartment), I would have steadily gotten lonelier and more stressed out until I finally collapsed. Instead, living in close quarters with a hundred strangers of all the various sexes forced me out of my shell and got me actually socializing with people. Unlike the movies where it’s nerds vs. jocks vs. preppies vs. artsies, everyone actually got along pretty well regardless of personal interests or backgrounds. I joined clubs, did sports, bitched about my classes to people in similar situations and listened to them bitch about theirs. In the end, four years of dorm living was more educational, and ultimately more directly valuable, than four years of attending lectures and writing papers. If only companies would accept that on a resume.
The bad: going from an only child with my own room to being in a building full of strangers, two of whom were in the same room with me, took getting used to. I didn’t get along great with my freshman roommates (though we tolerated each other for a year).
The good: I met a lot of people that I did get along great with (as did my two roommates) and hung out with them most of the time. We were from different countries, with different religions, different first languages, different majors, and different ideas of what we were going to do after graduation, and I think we all opened up each other’s eyes about a lot of things. The next three years were even better, as I was living with my friends then in a dorm that had its own dining hall (with pretty good food, to be honest), weight room, library, rec center, etc. New things were tried, old things were shared, friends were made, majors were changed, horizons were broadened and virginities were lost. And when it was over, I was ready (well, more ready, anyway) to live on my own as an independent adult.