“Trans women are women” is a rhetorical slogan - semantics.
It is my position, and has always been my position, that trans people are who they say they are. They know their reality, and their reality is real, valid, material, acceptable, legitimate, and a fundamental/ core part of their humanity.
However, one thing that differentiates trans women from women who are not trans, is sex observed/ registered at birth. It’s ok to recognise this difference, and in fact, may be important in some circumstances that we do. This is no different from other differences between women that it’s sometimes important to recognise, such as disability, ethnicity, age, etc. just as there are separate provisions in the EA for these axes of difference / diversity, it’s not unreasonable, per se, to suggest that there should be a separate provision in the EA that recognises “birth sex” as an axis of difference/ diversity,