The claim showing survivorship bias is from this comment (https://news.ycombinator.com/item?id=10181767):

> ...if my siblings an I were brought up just fine in the 80's without being in a "smart onesie", I'm sure we can do just as fine today.

There's no one here to say "I died because my parents didn't realize I stopped breathing". Yes, one can look at statistics, and see how many deaths would be prevented by this device, but the comment didn't do that. It's survivorship bias.