"The definition of marriage is a union between a man and a woman! You're changing definitions to suit your agenda!"
As I was saying
The definition of marriage was changed not by people just suddenly insisting it meant something different, but by campaigning to change the law. That change was accompanied by proper assessment of everything else that would have to change alongside it to make it work. Pensions, insurance, adoption, next of kin, literally everything that depended on the old definition was reviewed and adjusted to make the new one work. Because that is what real, progressive social change does.
That’s exactly not what is happening when Genderists redefine Woman. On the contrary, they insist that we do not look at how that changes everything that was hanging off the original definition, in particular the single sex provisions that support female people, to see whether they need to change, or whether any female people actually can identify as cis, but instead expect that everyone else has to keep exactly as they were so that the new male women can appropriate the female world exactly as they want it.
I would genuinely have no problem with society choosing to redefine Woman in they way you want if it went alongside protection of all the existing single sex provisions. It’s the way it seems to involve the social, political and legal undefinition of female people I cannot accept.