Although the message suffers a bit from obvious survivor bias, it still makes a good point.
One of the things that made me want to leave the USA again when I lived there (and unfortunately the same starts happening more and more here in europe as well) was how invisible the kids were. In the street I lived it took me over half a year to recognize that there were kids living almost in every second house - because they never played on the street or in the gardens. I treally shocked me. Driven to school, driven to sports (nobody used a bicycle, of course), driven to music school, driven home, then telly and Xbox.
I wanted my kids to grow up somewhere where I could let them outside and play with their friends. Of course I sometimes worry, but the price of keeping them "safe" all the time would be too great, imho.