I'm trying to get my head round all of this. My 19 yo dd has a few friends who are nonbinary. I respect their choices, obviously, but I look at them and can't help feeling a bit emperor's new clothesy, because they are just what I am, only younger: women dressed in jeans, hoodies and doc martens, not wanting to buy into the whole 'femininity' crap of make up, endless 'grooming', sexualised clothing, simpering, pouting, etc, not to mention the way this makes other people (mostly men) behave towards you.
I have tried, tentatively, to say that this has always been perfectly normal, maybe not always accepted, but it's not unusual to be a woman and not to be 'feminine'. DD & friends celebrate people like Demi Lovato 'being themselves'. I'd be celebrating a woman refusing to conform to stereotypes, but I don't see what pronouns have to do with it. @IvyTwines2 your explanation makes perfect sense, especially in an era where we're all about individuality and so many just don't want to know that their personal choices are always political.
I'm really struggling to explain why having a special identity is actually conveniently divisive. It is, isn't it? If we can't feel like a she because we're not into wearing skirts or nail varnish or whatever, isn't it giving the message that not all women meet the appearance and 'girliness' qualifications for being women, even if that's a choice, which then makes it easier to define 'woman' as something other than biology. And it makes being a woman the problem (which can be opted out of) rather than addressing the wider cultural issues that make so many people uncomfortable in their own skins.