OK, there's like 5 posts I seriously want to argue against, but since discussion is apparently banned I'll just say what I think.
A lot of times I hear people say things like "gender matter any more", "I don't really care about gender", "just be yourself, whatever". I'm willing to be that like 90% of the time these people are male identified and have no outstanding issues with gender.
Like you (talking to a hypothetical crowd of people, not necessarily even forumites here) understand that half the population fully and realistically expects to get payed 3/4ths of what the other half gets paid for the same jobs, soley because of gender? That people with gender dysphoria undergo intense unhappiness for potentially their entire lives, because they identify as a different gender than the one that biology/society gave them at birth? To say nothing of the countless gay, trans, or whatever people who get murdered every year because of who they are. Or hell, the men who get raped, or experience any form of intense emotional distress, and then have to hide it around others.
I'm pulling the most dramatic examples of course. But the point is, those people, they aren't arguing that gender doesn't exist, or that no one cares about it any more. Because they feel it, every day of their lives, as a fact of their existence.
TL;DR: Gender is real, it has real effects on people's lives. If you think it doesn't, there's a good chance you're one of the lucky minority who hasn't received any shit because of gender, which is fine, until the moment you presume that's been everyone's experience.