Oh, they don't want to do away with "women" as mostly as sex class. That would be too honest and rational.
What they want is for woman to mostly mean the sex class in practice and women's rights and needs mostly be defined by our sex, but also that we are all compelled to pretend some men are also in that sex class based on non-physical feely reasons.
To square that circle,
- We mustn't draw attention to the fundamental mismatch between "woman" based on the body sex and "woman" based on feely reasons, nor highlight the contradiction between Feminism saying women should not be limited by the cultural stereotypes assigned to our sex and accommodating as women people who, not sharing our sex, can only be differentiated as woman by sharing in those stereotypes.
- We mustn't have any of the basis for women's rights explicitly tied to our sex, even the ones directly linked to biology like abortion, because having that written down officially means the pretend women get undermined.
Genderist politicians see no issue with this because of course people really know who women are so there's no need to actually have that written into the laws that protect us, handwavy ones that lump us in with feely men are all we need.
Basically, we should trust they will continue to support female people as long as we are never so gauche as to talk about our sex openly.