We obviously, and fortunately for me, mix in very different circles!
Gay men are a mixed bunch, dudebros, nice guys, and in between, same as any group of humans, but one thing you can be sure of is that as a woman you are much safer in the company of a gay man than a straight man. You are less likely to be sexually harassed, attacked, or raped. If you are walking home late at night and you encounter a group of gay men, you'll probably get home safely. Some gay men may be rude or dismissive towards women - just like straight men - but that falls under the heading of 'sticks and stones..' - at least it's not going to escalate into sexual violence.
The fact that gay men have, as you say, a social life where women barely appear is great. Single sex spaces? yay! I'd love if us lesbians could have the same back again, and don't begrudge gay men their social spaces.
You say that because gay men socialise together, that 'women's concerns simply aren't on their radar' - socialising is socialising, not discussing social issues. 'Fuck politics, let's dance' as we used to say in my clubbing days😄
But gay men have sisters, mothers, grannies, colleagues, who are very much on their radar, so they do not live a life isolated from the other half of humanity just because they socialise together with other men.
Lots of gay men are as apolitical as the rest of the population, but the gay men I know who take an active interest in politics and society are aware of, and supportive of women's issues.