Almost everyone, in the UK, in Canada, in NZ, even in parts of the US and parts of Europe, was taken in by this stuff. Sure some individuals weren't, but governments, NGOs and other groups were.
Lots of the women here were too.
People aren't going to judge the Conservative Party more harshly than they judge themselves. People thought this was the next fight for rights, that it was medical best practice, that the science was solid even if incomplete, that people in political parties and institutions they trusted wouldn't let anything crazy happen.
My country is still deeply blind to what this is really all about, and to a large degree so are the other English speaking countries. Aside from the US which has some different factors. In many of these countries you still can't get stories published on this topic that are skeptical of the gender narrative, they have passed laws about conversion therapy that include trans kids, they consider misgendering hate speech, etc. In my country there is a man in jail because he wouldn't affirm his daughter, he's lost his child over it.
So yes, women and feminists are happy that the Conservatives have woken up and seen what is going on and spoken in public and said others can speak in public, and changed their approach on legislation and look to be tackling the penetration of this ideology into other social institutions.
It's very easy to imagine being stuck in the same place as Canada, which is what would have happened if the LP had won the last election.