A thing I realised today which has probably been observed by smarter people before me:
In fandom, when we introduce queerness into fandoms where that’s not canon, we rarely stop with making one (or more usually two) characters queer. It’s lots of characters. “Everybody is gay” is its own AO3 tag. In contrast, even in media/texts where there are queer characters, it’s usually a gay character. Or maybe two. And it never feels like enough.
And I think that’s because experiences of queerness in the real world are so communal, queer people don’t come by themselves any more than scientists are lone geniuses; they have queer relatives, friends, co-workers, they form networks. We seek each other out. So when we write queerness into fanfic, we’re - consciously or unconsciously - mirroring our experiences of (or wishes for) not just a queer character, of being queer alone, but queer communities. Because that’s something you never see in mainstream media unless it’s a LGBT-Themed Story, and then it’s usually depressing. (It’s what makes the exceptions like Rent or the 2014 Pride so great; they’re about queer people in communities.) But in fanfic we can fix that.
In conclusion: Everybody Is Gay is realistic, let’s do it more.