As a fag I may have some insight. Gay men were very radical from the 60's to the AIDS crisis to DADT and other issues. The wealthy, white gay men that make up the Human Rights Campaign/LAMBDA Legal etc defanged the gay movement by promoting assimilation in the form of gay marriage, corporate wokeness/IDpol, and perpetuating the myth that gay men were all high-income DINKS that could be marketed to. In reality, there are more Gay men in poverty as a percentage than straight men. That is why today you see Goldman Sachs and Raytheon pride floats these days.
Now that gay marriage is legal and being fired for being gay is not (well...they can make any other excuse to fire you) the wealthy cis white gay man is entirely driven by class interests instead of fearing of being persecuted or dying of a horrific incurable disease now that PREP is widespread. So now you have out and wealthy iBankers, Lawyers, Techies, etc that have a class interest in keeping their status and mainstream Gay culture, in my opinion, is heavily focuses on looks, muscules, status, and income so it makes sense for them to not be radical but still pay lip service to social liberalism by going to pride parades and fundraising for Mayor Pete, who is the apotheosis of the neoliberal gay PMC.