There are two sexes: male and female. Occasionally, that matters.
There is no such thing as an innate gender identity—no internal essence that makes someone more inclined to wear dresses and sip wine, or football boots and down pints. Those are cultural stereotypes, not proof of some mystical gendered soul.
The idea of gender identity is sexist, misogynistic, and regressive. It reinforces outdated norms instead of challenging them. Women do not need an inner feeling of womanhood to be women. Men do not need a gender identity to be men. Sex is real. Stereotypes are not.
I hope with the flurry of cultural changes, legal challenges, scientific findings and executive orders in the last ~12 months, more people feel able to stand up and be counted, and say - No More.