It was written by a "radical feminist," which I learned this year is a specific category of feminism.
The radical feminists are having a war with the transgenders who are physically male.
The trannies want to be included in everything as "women," and the radical feminists want to keep them out. It's gotten nasty, with the trannies winning most of the support on the left, so that radical feminist meetings are getting picketed and boycotted.
The New Yorker in August ran a lengthy article on it:
What Is a Woman? The dispute between radical feminism and transgenderism
leftist circus acts