You have to wonder whether the lawyer for the employer really believes the shit that she's spouting.
The difficulty for Maya is that this isn't a simple case of who's morally right and wrong. There's a narrow legal test to pass, which is whether her belief in the reality of biological sex is a profoundly held philosophical belief. As outlined in the legal feminist's tweets, it has to pass five tests clarified in a previous employment tribunal, ie the belief must
be genuinely held
be a belief and not an opinion or viewpoint based on the present state of information available
be a belief as to a weighty and substantial aspect of human life and behaviour
attain a certain level of cogency, seriousness, cohesion and importance; and
be worthy of respect in a democratic society and not incompatible with human dignity or in conflict with the fundamental rights of others
Personally I think a belief in biological sex does pass those five tests but who knows what the judge will decide?