I mean you don't have to advertise your FC as such but it does help LGBT people feel more comfortable with joining that FC. I've ran into my share of homophobia in game and yes, I have reported them and no, the GMs never did anything about it. So any time my static's needed to recruit a member in the past I always ask my raid leader to make sure the person is okay with LGBT people as I don't really want to sit and listen to slurs while I'm trying to prog through an ultimate. Like yeah, the game is one of the most LGBT friendly games out there and in most cases you can safely assume people aren't bigots, but I'd still rather not worry about being harassed over my orientation or hear slurs when I'm just trying to have fun in a videogame.

And for the record I don't assume people's FCs are filled with bigots if they don't state "LGBTQ friendly". It realistically probably didn't cross the recruiter's mind.