I do wonder sometimes how quite normal people can get it so wrong.
It's partly because, despite what they claim, they don't believe that transwomen are women. So therefore they see them dressing as women and think they're nonconforming. And that it's a good thing to be nonconforming. And that gender critical women are critical of nonconformers.
When those gender critical women say you can't change your sex, you're born that way, it only reinforces it to them.
Very early on, I had a conversation with an Italian woman whose husband actually taught feminism (I know).
It was a bit farcical and heated with us both getting increasingly louder and coming out with sentences that we each agreed with, despite thinking that we were having an argument until the very end. Where she pronounced, 'and so they wear dresses' in a sort of ta da way.
And I yelled, yes, because 'that's what women do, and she went completely silent, opening and closing her mouth. Watching her glance away as the cogs turned and the penny dropped was both very funny, but also incredibly rewarding.
Transwomen don't wear dresses because they're nonconforming men. They wear them because they believe they're conforming to female gender stereotypes.
Dismantling gender stereotypes is a cornerstone of feminism. And yes, it's very irritating when people get it wrong. Especially when they think that's exactly what they are doing by supporting transgenderism.
(I don't think that's necessarily what the person in the article thinks, she just hasn't bothered to ask any gender critical woman why they're gender critical).