If you've been on mn for a while you've seen all this before. Some threads take a wierd turn, depending on the stance of the first few posters.
I find most MN'ers, and mums in RL, are at the other end of the anxiety spectrum to me. I find most angst ridden, neurotic , and ridden with anxiety.
Infact mn in its nature, will attract a lot of posters who have more anxiety. I'm forever trying to persuade people to chill, relax, go with it - what's the worst that can happen? But I've long ago accepted that this is wasted.
It's probably because I come from a very loving family, and my mum is amazing. She described me as content, and stoic (never complained about being a diabetic at aged 1). She instilled in me an attitude of this is not going to stop me doing anything and it never has. As I have inner contentment I've never been afraid, and a quite gung-ho about going on say stealth at Thorpe park, anything scary, any ride, ziplining, watching any film - nothing scares me. But I appreciate I'm more one end of the spectrum than the other on this.
Thus I will never be reconciled with how neurotic and anxiety ridden most mums are. I believe it's actually damaging to their children and makes raising them more controlled and not as free as it should be, because of the mums anxiety. This irritates me hugely. But I'm not quite sure why.
I've thought about it a lot, but haven't established exactly why I find it so irritating. It may be because my contentment makes me a tiny bit narcissistic and I have a tendency to be superior, look down on those weaker because their natural anxiety is a sign of lack of self respect which upsets me and saddens me.
I thus tend to like fighting for, helping those, who need help, eg don't know how to advocate for their dc against a school Senco, or fight HMRC when they are bullying people over a parents tax return mistakes.
I can't make people have less anxiety though. It's their default. Like mine is the opposite. Back to the Op though, no this is not new, the pearl clutching, and over anxiety of mums on mn I suspect will always be the case.