Having lived in some of those scenes, the environment or the identity or political affinities that lead to the creation of those groups are only indirectly linked to the cultural aspects that emerge from it. There very much is specific music, specific visual art, written art, zines, comics, software (!) that emerge when people live off the mainstream. As for lgbtqia cultures even, with the lip embrace or sometimes slightly more heartfelt embrace by mainstream media, is far from being culturally present, let alone politically. Just tally up the ratios in the comments here…

A rainbow flag is not techno/house/zines/novels, advertising is not culture. Advertising is by definition the antithesis of culture, adopting cultural norms. Ultimately it will be hollow and opportunistic because that’s its mission. An ad showing a leatherbear is not culture, and I don’t think you will ever see a leather show on prime time, if at all. Yet a culture it is (and possibly a lifestyle, but one doesn’t imply the other).