People outside of college can and absolutely should have access to safe spaces, yes. Why wouldn't/shouldn't they?

As for your second question, it's so obviously disconnected from what has been said so far that it's hardly worth even answering. A victim of homophobic intimidation who wants a space free of homophobic intimidation is not "reducing their ability to deal with the world they live in." You're stringing right-wing jargon terms together in ways that obviously don't make sense. A person doesn't have any less of a "curious mind" simply because they want to spend time in a place free of intimidation, violence, or hostility.