I understand your concern and feel that part of the problem is that in many areas in the US it's not comfortable or safe for adults to be out walking (unless th

I understand your concern and feel that part of the problem is that in many areas in the US it's not comfortable or safe for adults to be out walking (unless they are with their dog.) The streets aren't set up for it, the police think it's weird behavior, and as a result people stay inside which means there is less adult supervision for the children out in public. If you ever visit Europe you can expect to have your mind blown as you will see nine year olds walking themselves to school, taking public transit independently, as the norm. This works because there are always adults out and about.