There is a clear biological definition of the sexes (down to the genetic level if you want). Rather than changing definitions in language, wouldn’t it make more

There is a clear biological definition of the sexes (down to the genetic level if you want). Rather than changing definitions in language, wouldn’t it make more sense to add to our current definitions and language to accommodate the social flavours of sexuality? A more adaptive definition of gender might be more suitable: social gender, body gender and biological gender. E.g. bisexual trans women.