you won't get buy in from the other side - trans people are not a separate category, trans women are women and trans men are men. There is no deviating from that line of thinking.
at this pace, in the not too distant future, there will be no women's athletic records held by actual women, there will be no place where women can have privacy and feel safe - biological males will have access to women's bathrooms and locker rooms, even battered women's shelters. Everything designated for women will be accessible by men. This is not hyperbole, this is the current platform of one of our 2 major political parties. We keep being told Joe Biden is a return to normalcy, but this is his platform - it was one of his first actions taken as President, which people dismissed as a toothless executive order but now it's being codified into law with the equality act.
And this is not alarming to half the population because the extreme has become mainstream and nobody cares. the media aren't covering this objectively and are instead telling us what we really have to be concerned about white supremacy and police brutality.