So however we choose to use and view it, I think we have to bear in mind that, to many it will be seen as a shorthand for anti-trans
I agree with this. And it might be why the OP is asking.
However (i'm not necessarily addressing this to you PriOn1, just generally), it's my understanding that gender criticism is a crucial cornerstone of feminism. And therefore it should not be allowed to become misunderstood.
I have a slightly foot in both caps approach, because I acquired what I call late on feminism, largely as a result of this board. And specifically, this board's fuming explanations of why it's wrong. And not just rapists in women's prisons. But the fundamental concept. Of gender - and transgender.
It was explained, at length, that the reason women are oppressed globally, is because of their sex.
And gender is the means by which it's done.
For instance, the stereotype of the expectations of women being, historically, that they are too fluffy to educate, the vote is not necessary because it is their husband's knowledge that is important, they are too irresponsible to have their own bank account, or mortgage, they should not be visiting bars without a man, or with other women, they should provide sex on demand, and they are there to be decorative.
There are loads more, obviously, but given that in my lifetime women were not allowed to hold bank accounts, get a mortgage, could be refused drinks, were legally raped by their husband and yes, almost exclusively support the skincare market, then I think you have your answer.
Women are silly, ignorant, need to be financially dependent, must not be allowed out to drink, should look pretty, and provide sex.
Oppressed because of their sex, and gender ^ is the way it's done.
And then a bunch of (sexist) men came along and said they have a 'female gender', and therefore that is why they are women. Because only women have it. So much so, that if you express it, you are legally deemed by the government to have actually changed sex!
Regressive, sexist nonsense, utterly relying on damaging stereotypes, and cementing them every step of the way.
Obviously, you have other people who totally uphold gender stereotypes, but still don't think men can be women.
But the term was originally called gender critical feminism. Feminists were the first people to spot what was going on, because being critical of gender stereotypes is baked in.