I think that's quite true expat. I do think people are uncomfortable, not just because they are sad for you, but also they fear that it may be catching. If it can happen to someone they know, it makes it more real, and there is the possibility that it could happen to them.
I don't believe that I've ever really been like that myself. My first experience with child death, was when my cousin died at 6 (I was 11 at the time). I don't remember the aftermath of his death so much, but I do remember his sister crying (she stayed with us, when his parents were in hospital).
I had a friend whose second son was stillborn, a year before DS was born. I wasn't scared that it may happen to me, on the contrary, she was a wonderful comfort, and strongly advocated going to the hospital with every tiny niggle. Still, knowing about monitoring movements didn't make me immune :(
That said, I'd never visited this part of MN before Tamsin died. I'm not sure if I was even aware of it's existence. That wasn't because I thought bereavement was catching though.
I've been on threads - not so much on MN, but more on it's 'rival' site (which I don't go to now), and had the most heated (almost) arguments with other women, when advising other pregnant women to go to hospital immediately with reduced movements. I have been accused of 'scare-mongering', and had people tell me that "my midwife says..." and it gets me, it really does. To be honest I'd rather be scared and seek out advice sooner, rather than listen to soothing reassurances and go too late.
I think that losing a child is so scary, so very scary, that people would rather hide away from it... pretend it doesn't happen. And if it does, to someone they know, they'd rather not think about it. They also want to know it's survivable.
My mum noticed that on FB some people don't comment on posts where I maybe say how I'm really feeling, yet do when something is upbeat.
Yet so many people get upset at watching documentaries about dying children. My (probably rubbish) theory is, to them it's the same as watching a horror movie, they get to 'test out' their emotions, in a safe way. Damned different if someone they know experiences it though, then empathy weariness soon sets in xx