I honestly don't care if you believe there are only 2 genders, but people can live their own lives and people having a gender that's different than the norm is none of your business, nor does it affect you in any way. Transgender people commit suicide at extremely high rates because people don't accept them, you know that right?
But do you understand that you are asking me to comply with having to call a male who is not fully transitioned a woman, even though it goes against my beliefs, simply just because it would spare their feelings?