The concept only works if you stop seeing “woman” as a description of someone’s sex, and start seeing it as an “identity”. Trans women are male in terms of sex but identify as women in terms of gender.
The ideology is redefining the word woman to ensure it includes trans women.
I hope that helps - it doesn’t totally make sense to me so I maybe haven’t explained it very well.
It doesn't make sense to anyone SlipperyDippery.
If woman is a gender identity, it needs a description, or a means of identifying it. Which, to my mind, has never been forthcoming.
And you still need a word for an adult human female. How do you differentiate between an adult human female, and a minor human female. We have the word girl, what's the word for the adult?
None of it makes sense.