What I’ve observed among my kid’s friends is an initial desire to go to Berklee because of the very exciting idea you mention–a place where thousands of people love music as much as they do!
They learn about other schools, too, and widen their lists. Some return to Berklee as their choice after all and students love it. My son’s teacher is an alum. My kid wasn’t able to choose it, but at that point he said he wanted sports, a campus, and other subjects. He had some of the concerns you mention. His intel was that there are particularly a lot of male guitarists.