It's such a bad faith piece. It is a single-sex space that has nothing to do with how "gender-neutral" the activities are. The two can and indeed should co-exist. You have to accept her ridiculous beliefs for the whole thing to even vaguely make sense.
@Arran2024 Maybe, but not inevitably, I went to a girls' (state, Catholic) school for the majority of my secondary education and it has had very much the opposite effect on me.
I do read and often still enjoy the Guardian but last year I googled as many of the regular writers as I could to see where they were educated and was really shocked to see that only a tiny minority didn't go to Oxbridge. Not in line with their branding at all and I resent some of these people preaching to me honestly when I feel like I am far more in touch with the actual world than they are.