This is not a site set up to support a particular sub demographic. Its a site where people can, largely, express their views and debate with others.
That can be very discomfiting when people express views that appal you. I am regularly appalled by views expressed on here, and I am sure others are appalled by my views. But overall, I welcome that. I find it really valuable to be exposed to those views and to be able to challenge others' views and have my views challenged.
There was a post the other day about a child who seemed to have the same condition as mine. Plenty of appalling comments about how the child needed to be punished out of this behaviour and was choosing it. But plenty more from parents who had similar children and were offering advice. In the end the OP got their child diagnosed and they did have the condition. I hope that some of the ' punish the child' parents learnt from that. That would be less likely to learn from it if MN were a deletion- happy site.
We can see even from this thread that some people call others transphobic and those throwing this label around will be called misogynistic by others.
People on this thread are distressed by the marriage support thread, yet posters on that site regard it as a lifeline.
Some people's views offend us, that doesn't mean the best course is silencing those views.
Some people's life experiences offend us, but that does not mean their life experiences should be extinguished from public records.
I am glad Mumsnet exists as a rare and valuable site where people from all backgrounds and experiences can talk, even if that is very challenging at times.
Its fine if some find that too hard. There are other online spaces that are explicitly support resources for particular demographics that might better suit them. Many of use will use those spaces in addition to Mumsnet.
But MN is a space for everyone, not just those with particular political beliefs or particular life experiences. And I am glad of it.