Your comment is incredibly insensitive and unkind. I sincerely hope that if I were to tell you what happened to our family face-to-face, you would not have responded in this way.
I was assuming that it would be a worthwhile anecdote to share, given that most people appear to find it unnecessary to get tested. If one person on the Internet reads my comment, decides to get tested, and finds they are a carrier of a severe genetic abnormality and avoids delivering a stillborn child, I frankly don't give a shit how "inappropriate" it is.