Looking at this a different way, this isn't a British Cycling event. This is a private event that creates their own rules. Up to them if they want to alienate 51% of the population I guess.
And more importantly, I don't think this league nor the other one that also runs non-BC fixed crit races at HHV is a problem. In fact I think it's a good thing. It looks like EB and the other racer have targetted those races, and I hope more TW travel to compete as well. A league/category for TWs would be great, don't you think? Nobody is forcing the women to enter. If the women stop entering, that's fine. Then all the TWs could race each other, what's not to like about that?
Yes that means no category for women, however there are lots of other races out there, track and road and circuit. If anyone else wants to put on a private fixed crit race and make the categories by sex, they are welcome to.
Sometimes I think we need to step back and see things for what they are and how they are going and work with the flow rather than against it.