We've been fighting for all women's sex based rights for years and that includes transmen. If it makes you feel better, I've never known a transman who passes as a man so I think they're most unlikely to be excluded if they suddenly decide they want to join the WI despite claiming to be men.
This is the law as outlined by the SC. It makes perfect sense to me and it's in line with other safeguarding rules in other areas. If you want to make extreme physical changes, that will bring consequences and your doctors should ensure you know about these because they're a problem you created and you therefore have to solve.
The WI wants sex and gender to be the same but has finally conceded that they are not.
Respectfully, if you are being sincere in these posts then I'm not sure you follow the issue sufficiently to have a discussion. You apparently read my full post explaining the Transman Gotcha but didn't understand a word of it, you don't understand what's just happened with the WI regarding sex and gender and you don't understand that women's sex based rights include transmen.