Low density suburbia can, and usually has, plenty of walking spaces with a ton of nature around. I lived in multiple suburban neighborhoods and I was always either within a short (and easy) drive to a park or had great walking areas in the neighborhood itself. Contrast with high density, where you have to deal with pollution, noise and potentially crime just to walk to a park (and in the park itself)

Regarding "fear or interacting", in my experience I have a lot of more interactions, of the cordial and polite kind, with the few neighbors I have in my low density area than I've ever had when I lived in a high density city where you can feel like an ant in a colony.