That was not what I meant, and I apologise if I was unclear.
To restate at greater length: our objective, both on principle and for tactical reasons, should be that women's things that include both women and transwomen, but exclude other men, must continue to be illegal. Correct?
This does seem to be more than we originally asked for (at a minimum, women's things that exclude transwomen to be both legal, and available when we want or need them). Insisting on it is bound to be presented as illiberal.
So, when trans allies says that they want to be able to invite their trans sisters to their women's club, how do we answer?
One. It's illegal (not constructive: laws can be changed)
Two. The only defensible reasons to exclude men also apply to transwomen, so your club is illogical (patronising: they may simply disagree with you)
Three. If you invite them they will want to come to all the clubs (defeatist: we can say no)
Four. If you invite them they will want to force themselves into essential single-sex things that aren't clubs (ditto)
Five. Your club will normalise a bad idea which is particularly harmful to vulnerable people (non-ecumenical: bad ideas should be debated, not suppressed)
To summarise: this is a matter of faith. We do not want you to practise your faith, even amongst yourselves, because it is demanding bad things and spreading bad ideas.
I think this conversation is going to continue to be quite painful all round.