So? Languages add words and definitions all the time. Some people use pronouns in reference to roles rather than biology, some don't. I agree trans people should also understand that and not get enraged when someone uses a pronoun differently than they do. But most doctors and psychologists use man and woman differently than they do male and female, and neither would deny the biological facts. Genitals and chromosomes are not always black and white absolutes, and neither are the behaviors of men and women.