You think if the outside would actually offer something instead of depressing scenery: stores and cafes within walking distance, parks and playgrounds, would people prefer to exist outside a lot more?
I could not exist at all in those suburbs. A cafe, various stores, and a supermarket within a 5 minute walking distance is as integral to my lifestyle as owning a fridge. Also having some forest around to go for walks is nice. The only thing walking for 10 minutes in an American suburb will get you is probably more suburb. If you're lucky a McDonalds and 20 acres of concrete parking lot will provide a change of scenery.