I guess its a way to connect with other women - something we all share on a physical level that makes us feel like we have something to share, something in common. Sometimes its tragic, but yes, that's life - I think in nature humans prefer to hear bad news/gore/horror, perhaps so we can say 'there but for the grace of God go I...' etc.
For the record, I was totally calm & ultra cool about my DD. Just didn't anticipate anything going wrong, just expected to have a baby somewhere near the due date. My DH was v superstitious & didn't want anything in the house, until I said we needed nappies, clothes, Moses basket etc ready for hospital/coming home!! I had her a couple of days before EDD & all went well.
With this one, having had an early pg loss, met loads of mums with tragic stories, premmie babies & so on, I feel all too aware that I am SO lucky to be nearly 12wks pg & it could all still go wrong. Not sure why I feel so anxious, but maybe forewarned isn'tforearmed when it comes to pg/labour/babies??!!
I try to keep in mind realistic statistics so I don't get too anxious but horror stories don't help me either. I might try the advice above when its public knowledge & well-intentioned 'advice' comes my way... :)