that will not accept
No problem accepting biology here, and no problem with a man identifying female as his gender identity.
But big problem with him telling me that his sex is now a biological female, that he is a woman. No, you were born and observed to be a male. You are now, having been socialised as a male, and having a male body, identifying as a woman. No problem, but you aren't a woman
And I'm not going to gaslight myself and others to validate you. So you're going to have to accept that , because newsflash, I do actually have a voice.