You don't ask in a petrolheads' forum if we should disincentivise cars and incentivise bicycles.
Just like you don't ask in a cyclists' forum if maybe it is wrong to make driving more expensive if we don't also provide more alternatives, because not everyone lives in London's zone 1 where you can easily take buses tubes bicycles etc.
Same here: mumsnet is a forum largely populated by women, so will have the same kind of bias.
The most glaring examples are with relationship and sex problems: if he wants more sex than her, he's a sex pest. If she wants more sex than him, he doesn't understand her needs etc. I am simplifying, of course, but there is a certain tendency of this kind.
All I am trying to say is that one should read and write in these forums full aware of their biases. Full aware that these forums are not necessarily representative of the general population, and that certain voices will be more represented than others.
If you do this, frequent these forums with open eyes, and appreciate that all feedback must be taken with a truckload of salt, they can be useful.
If you go in expecting that everyone will think like you, or expecting to convince other people of your strongly held beliefs, you risk stressing out and picking silly, avoidable, useless fights.