Why would that be revealed preference? If they have option to explicitly negotiate, they negotiate themselves different situation. This is what happens when you take that option away
1.) You cant take a single factor out of multi factoral decision and claim it is "revealed preference". It might be "cost they have to pay for something else".
2.) You cant assume they had ability to predict the future when they joined the community.
3.) You cant assume they have a place to go to now.
4.) You cant ignore women who in fact left those communities.
5.) You cant ignore majority of the women who in face did not joined the community.
And the same thing applies to men btw. You cant just claim that a suboptimal situation in which a man stayed is somehow revealed preference of males.
That's a big presumption.