Guys who don't read BL and girls that don't read GL are limiting their options so much. Though, I guess it's also a mental barrier of "this isn't made for me, so I don't want to read it." I know more girls who are into GL outside of their "intended" demographic because there's more shoujo/josei GL that is unequivocally about girls loving each other than there is shounen/seinen BL that isn't about a dude that looks like a girl. And there's more shoujo/josei manga with wlw treated with respect in them than mlm in shounen/seinen. I didn't think my point was going to be "there should be more good gay characters in shounen/seinen" but I guess that's where I ended up