If a white person is adopted into a black family can they not be transracial? If someone with a black mum or dad is fairskinned in contrast to their siblings are they not black because people do not recognise them as such on sight? Either you treat the wishes of transabled, racial, and aged people with as much weight as transgender folk, or you admit internal “biological” feelings of identity play second fiddle to the physical and statistical realities of our world which determine how sex-segregated spaces work.