That is very weird.
An important book is coming out that is likely to be of interest to their readers, whether those readers agree with Barnes or not. They can't not review it, so they restrict access.
I think puberty is much more difficult now. A decade ago I allowed DD to have Fb, or bebo, when leaving primary school though insisted everything went through my email until she was 13. Eventually we sat down and discussed the endless stream of posts from "cool girls" having fun hanging out in shopping malls etc. Phones did not have the same capabilities then, so the posting would have happened from their bedrooms. Ie they were much like everyone else, going to school, doing homework, watching box sets of Friends or playing Farmville, and occasionally handing out. Even then boys were under pressure. DS was exposed to porn aged 11 (he was upset so told me.) Others aged 8. Some of the memes circulating were offensive and cruel.
Fb is out. Now it is TikTok, SnapChat and WhatsApp. Parents cannot control and the social pressures from influencers, filters, smartphone capability, etc have grown immensely. Throw genderwoo, and a girl who does not present in a typically feminine way, has poor social skills, has self-esteem issues and and and, is very likely to feel inadequate or plain "wrong".
(Sport was DDs saviour. Lots of positive role models either amongst the older girls or, around 15 when she started playing for senior teams, young women. Unfortunately now the presence of a stronger TW, either on the opposite team, would be likely to put her off. A couple of months ago in her 20s she wound up pretty battered playing against someone in their 30s with a male body.)