Mainly lurker, occasional poster but frequent namechanger here.
I can see the tightrope MN have to walk and appreciate the difficulties for a commercial venture, which has to make money to survive.
Sometimes I have to go to another place (brown furry fruit cultivators), because I need to see people referred to by their actual sex, to see facts stated without censure and see some ideas and speculation which are probably true, but might equally be libellous. However I don't think anyone posting there has ever changed anyone's mind about issues, it's for conversing with people who already have certain viewpoints.
Mumsnet have a position where they can change minds, people see a random thread on active and follow the threads until they find something showstopping, which makes them aware there is an issue, where they'd never have thought to question some of the ideas before. I never knew about any of this until I saw the Olympics threads years ago.
Anyone searching MN will see hundreds, or thousands of reasoned, logical, thoughtful posts. When asked to point out actual transphobia on MN, a poster had to admit you can't, because genuine transphobia is always deleted. It gives MN a quality of debate, which is sadly lacking on KF, even if they have refreshing honesty.
I think having and applying fairly strict guidelines does make MN a better place, however I also think there should be a lot more leniency before wielding the ban hammer, it's so easy to use incorrect pronouns, terminology and names, as the mental gymnastics required to use the correct ones are often too complicated.
No-one has to use MN, we can all choose to 'go well' somewhere else, but despite the losses, MN still has the most amazing women you'll find anywhere, so there's nowhere else on the Internet like it. On the one hand I think there are too many for them all to be picked off, but there will be a tipping point where people will go elsewhere because too many of the great voices have been lost.