Gender essentialism

Gender essentialism, also called biological essentialism or bioessentialism, is a belief that treats gender and sex as interchangeable terms, claiming that all people are essentially male or female. It weaponizes biology to invalidate transgender people's genders. Gender essentialists regard gender as a binary pair that are complete opposites with separate traits that can all be attributed to biology. Essentialists may claim to support transgender people, often using the argument of having "a brain of the opposite gender" relative to their body; however, this is a form of biological weaponizing, and reduces people to chromosomes and genitalia under the assumption that there are no variations in sex traits. This concept completely erases the existence of intersex and non-binary people.