@Dannythefink you're usually on the ball, and scrupulously researched, but here you argue no one denies the reality of sex as opposed to gender and no man would exploit self-ID to identify as a woman. You may not have heard of Alex Drummond. https://www.thetimes.co.uk/article/how-the-yorkshire-pudding-test-can-bring-peace-to-our-culture-wars-968s5w7v5
2./ Alex born a male, decided to identify as a woman at the age of 40. Alex doesn't believe "she" should have to take hormones, have an op or even shave "her" beard. Alex calls "herself" a lesbian and was a trans advisor for charity Stonewall. Here Alex explains the beard.

3./ @Dannythefink you must assume the 24000 followers of @ALLIANCELGB are just idiots. Yet, we are genuinely concerned the idea of a so-called gender spectrum ends up erasing gay people. Here's a trans activist arguing that gay people don't exist.

4./ Do you assume thousands of feminists such as @Womans_Place_UK @ForwomenScot and @jk_rowling haven't given the subject a moment's thought? Meet Pippa who identifies as a woman two days a week and was voted a top woman in business.
https://www.thetimes.co.uk/article/anger-over-women-s-business-honour-for-cross-dressing-banker-h0gv3l7nw

5./ Can I respectfully suggest you research this subject more? Have you heard of a journalist called @VictoriaPeckham ? She works for a newspaper called @thetimes and recently tweeted this about the denial of biological sex. Yes really. https://twitter.com/VictoriaPeckham/status/1271348726326595584?s=20
6./ Here's a BBC educational video that tells primary school kids there are over 100 gender identities (including male and female). By conflating gender identity and sex and merging them both into a mish-mash spectrum it does indeed deny biological sex its proper place.

7./ You're effectively comparing an entire movement concerned about the advance of some extreme transgender notions (such as self-ID) to a bloke in Yorkshire making silly tweets. That's beneath you. We'd be happy rationally to explain more if you like. All best.