The online 'echo chambers' are part of it winning. Most echo chambers aren't, and are just the media complaining they don't control everything. And on top of this, echo chambers aren't new either. Echo chambers are the base state that existed before. Your echo chamber before the internet was your local community that you interact with. Its modern peer to peer communications (like the telephone and facebook) that changed those groups.
Eh, Turing and Mercury were gay. Second, they're associated at least as much as an activist most haven't heard of before.
Third, their isn't a het cis community, because there's no pressing need for one to exist, and there hasn't been. The only reason an LGBT community exists at all was outside pressure and discrimination basically forcing them to move to cities and get together secretly. It now exists in America as more a legacy of that. In some other world where there was never discrimination against gays, or at least not much of it, there would have been no LGBT community, like in Rome. Gays would just be men attracted to men, and there wouldn't be anything special about it.