Pretty sure they mean the bioessentialist rhetoric of gender comes from genitals at birth. It’s an absurd claim that transphobes hide behind.
I absolutely agree with you. I phrased myself badly. Women solely being people with vaginas is her view, that’s why I said it that way. She boils being a woman down to what you were born with, so when she employs “women” that’s what she means. I was (still am) very tired. I’m sorry. Trans women are women, genitals do not determine what you are.