[mitthrowaway2]

Survivor bias is not as powerful an effect as the HN contrarians who always bring it up seem to think. Here's an example of why: Each kid reports not only their own experience, but also those of the people they know. Kids with active social lives grow up knowing 20~100 other kids. The death of a friend is a memorable event. There's no world in which kids were dying a lot from playing outside but we just never hear their perspectives, because in that world, every surviving kid would be talking about their three or four childhood friends who all died from lethal accidents on the playground or crossing the street.

Those things did happen and still do, but they were rare and impactful occurrences that had lasting influence on the lives of the people in the victims' social circles. If anything, each one will have been overrepresented in the self-reported stories of random commenters.