Thinking further, this is a perfect example of why 'gender identity' is a crock of shit.
It's bleeding obvious that this person is female (see what I did there?)
That's why the twitter reaction was so nasty and so very different from reactions to transwomen's more ludicrous assertions.
Same reason that transmen are taken to court for sexual assault because they 'disguised themselves as men' and it's fine for the press to discuss them in those terms, while transwomen rapists must not be misgendered or even referred to as trans.
Same reason nobody appears to be up in arms that the GRA explicitly disallows transmen from inheriting property or peerages that are earmarked for actual men.
Society treats us according to our sex and cares not a jot for how we want to think of ourselves inside our heads. It's just irrelevant. Women are shat on because we are female. Transmen are shat on because they are female. Transwomen are lauded because they are male. You can 'identify as' whatever the fuck you like but it's about as meaningful as having a favourite colour or band in the scheme of things. You will still be identified as female, or male, or black, or white or whatever and treated accordingly.
I don't know when 'identifying as' something became a thing, but I think it's fairly new. I do wonder if it's linked to the amount of time people (especially young people) are spending online, where you can to a large extent be whoever you say you are and there isn't the reality check you get with face-to-face encounters.
'Man', 'woman' no longer have any meaning. They are just empty sounds. Call yourself either, or any one of the other umpteen gender options. It just doesn't matter any more. While you're distracted by that and kept busy pouring all your social justice energy into your 'identity', society will continue to shit on female people and privilege male people.
'Identifying as' something is a huge, navel gazing, waste of time and energy that could be far better spent.