re. Self appointed leaders
I think sometimes it can seem that way, not just because some active groups take it upon themselves to then use their position to criticise others (there have been threads aboutt this so dont want to derail this thread). And part of the problem is too many are happy to have their feminism spoon fed to them and go in for this sad fan feminism.
But there are other groups getting on with their work from their perspective and women supporting their campaigning.
So in fact those of us on mumsnet have an advantage. There are a range of groups working on gender critical issues. They offer different analysis and suggested actions.
We can pick and choose the bits that match our own politics.
And in some way mumsnet operates far closer to 70s women's liberation local groups than any of the groups claiming they are 21st century reincarnation of WLM. That's because women's liberation was based on local groups where women without claiming to be experts or specialists met together to share information and ideas on issues of common interest. This might lead to joining a campaign or writing to an MP or ... Or (post lockdown) having a stall in the local market or ...
So as others have said, even if it can seem fruitless we need to make our voices heard.
I was wondering whether this might be something to raise locally (depending on how visible you feel you can be)? eg local councils as much as central Government use census stats for planning, funding and so on. A letter to a local paper (if your area still has one) could probably reach a of people who might have no awareness of what is intended.
Even just to state the obvious. That the census is meant to capture actual facts at a particular moment in time. And even if people can legal "change their sex" it is important to know how many people who are registered as birth as one sex, later decide they want to transition. This would also be relevant to planning services.
(personally I think we should all ignore the gender question. Do not legitimise it by answering it. Show it up for being irrelevant to 99.9% of the population.)