I think it's wise to be careful, but by the same token, many of the "rules" weren't around when our mothers and grandmothers were pregnant and most of us turned out just fine!
This is true to some extent, but there were loads and loads of unexplained stillbirths that would now most likely be attributed to listeria.

I know for me, I just didn't think the risks were worth it. As much as I wanted to eat cold meats, brie cheese and pate, the health of my baby was on my mind constantly so it kinda turned me off those foods because of that.