I'm in my early forties and both my parents worked (as did all my neighborhood friend's parents) and we still spent a lot of time wandering around. Honestly I think people are really overthinking this. We spent a lot of time wandering around outside because we were bored. Now kids have an endless well of entertainment to choose from so staying at home is a much more appealing option. It's always tempting to romanticize your childhood but if I'm being honest, most of that time wandering around outside I was bored out of my skull. I was just marginally less bored than I would have been sitting at home.