Gender-critical feminists disagree with the view of some LGBT activists that gender identity should be prioritised over biological sex in terms of law-making and policy. They fear sex is being argued into non-existence and that this will erode rights hard-won by women in the face of historical biological discrimination.
Some LGBT activists regard the focus on biological sex as transphobic. They argue that while they do not deny the reality of biological sex there must be a recognition of complexities beyond binary definition, and that people should have the right to privacy around their sex characteristics at birth (as was agreed in the European convention on human rights in 2002, which led to the current Gender Recognition Act).
Can you imagine the staff confabs that had to be carried out to get all to sign on to that?