1. Because people don't always live up to their own ideals.

2. Because being against sex-based stereotypes doesn't mean you have to deny the reality that there are observable trends in how women and men behave. Humans make assumptions based on trends about all kind of things all the time. It's hard-wired on us because in order to survive in the distant past we had to decide in an instant if, for example, that big and scary lion over there was a threat. Getting right of generalizations may not be possible, but that doesn't mean we cannot strive for a fairer society or challenge plain baseless ideas like, for instance, "men are the rational ones, women are the emotional ones".

3. Because some GC women have a hard time believing that women could advocate so hard for transgenderism.

#1 I can understand. #3 I dont understand why some GC women have a hard time believing that women could advocate so hard for transgenderism. Every study on trans issues finds that women are more supportive of transgenderism than men.

For instance a PPRI study found that 51% of men support requiring transgender individuals to use bathrooms corresponding to their assigned sex at birth, compared to 40% of women. According to a poll, 59% of men support banning trans women in women's sports compared tp 46% of women. 29% of men oppose banning trans women in women's sports compared to 34% of women.

This brings us to point #2. The observable trends show that women are more supportive of transgenderism than men. So if they were acting on observable trends then they would know women are more likely to be advocates of transgenderism than men. But since they deny that they are obviously acting on stereotypes and their own ideas, not observable trends.

Last year my sister and I (both cis women) overheard our dad misgender Rachel Levine while talking on the phone with his brother. As soon as the conversation was finished, we called him out on it and insisted he use "she" for Rachel Levine. He kept telling us that Rachel Levine is a "he" and is a man. My dad is a white, straight, cis, able-bodied and middle class male, basically he fits the definition of "privileged" in the social justice context except for the fact that hes not Christian. We are Jewish. I am a disabled woman. My dad is not supportive of the trans community and its one reason I don't often interact with him.

Women, or people who were assigned female at birth can absolutely be fierce advocates of transgenderism, including those with other marginalized identities like WOC or disabled women.

Could you explain what do you mean by this? What does make two people be the same "gender" if not sex-based stereotypes? If self-identification alone, as you have told us, makes a woman how "transwoman" can be indistinguishable from "cis women"? If self-identifation alone makes a woman, how can a "transwoman" "pass" or not?

Gender is how you identify yourself. My gender is female. I share a gender/sex with Oprah, Laverne Cox, Beyonce, MJ Rodriguez, Rihanna, Jazz Jennings, Kim Kardashian and Taylor Swift. I do not share a sex with Lebron James and Elliot Page.

Some trans women who take hormones and some pass to the point where you wouldn't be able to tell she is trans by looking or at her or hearing her voice. There is no need to use quotation marks.