Most of the gay people I know don't give a shit about 'gay culture,' and some are actively pissed about it being a thing. Although some of the others flame so hard that I have a hard time being around them.
Thing is, you can say something similar about any group. There are lots of Christians, Atheists, Democrats, Republicans, geeks, sports fans, motorheads, hipsters, burnouts, etc... who are just as obnoxiously in your face about it.