“biological male” is if anything bad description of reality. A trans woman who has been on hormone therapy for a couple of years is biologically closer to cisgender women than cisgender men. And even more so if they’ve had surgeries. But usually people who use that term don’t care and lump everyone who was assigned male at birth into that category.

I could attribute this term to ignorance because it sounds reasonable, but it’s far too often used to exclude trans women from spaces that other women belong