I think it's impossible to overstate how valuable Mumsnet is to a broad range of women, which makes the efforts to restrict discussion to to shut it down even more disturbing.
Around trans issues, there's a range of opinions on here, ranging between "Transpeople are either mentally ill or fetishists, and their pronouns should never be respected as it contributes to the delusion", to "transpeople are valid and should be treated as their chosen gender".
But for so long, here was the only place you could say stuff like, "I respect genuine trans people suffering from dysphoria, but I worry that predators will use that tolerance to access women and children where they're vulnerable", or even, "male genitalia shouldn't be allowed into women only spaces", or "Why is there such a massive crossover between autistic girls identifying as dudes, shouldn't that be studied?" without being treated like a massive bigot. The only place where you could express concern about the number of transwomen in the prison system who were in for sexual offences. The only place where you could refer to a male rapist, who raped with his penis, as a male, without being jumped on for using the wrong pronouns.
It's very illuminating when you see cases like this, where an ardent, seemingly stereotypical TRA, not only wanted to shut down women's gender critical views, but also had a sideline in creating artwork of child sex abuse for money, as well as having a private collection. For anyone in any doubt, 'chibi' is a Japanese cartoon style where characters are depicted with babyish proportions - think Funkopop proportions. Large head, big eyes, small chubby body. Chibi isn't inherently noncey, and sometimes adult characters are depicted in the style - but the second you start introducing sexual situations in that art style, the paedo alarm does go off somewhat...