My European perspective. I wouldn't blame it on suburbs in particular. I would blame most if not all forms of city living. Most people live in flats where nobody wants to have anything to do with their neighbor and there is no communality. People move in and move out, nobody cares. The less you have to hear of your neighbor, the better. FWIW I would rather have a 'burb castle than a flat where I have to smell and listen to idiots drink, smoke, fight and blast music. And I think I'd rather get to know the neighbors over at the adjoining castle than the scum in these neighboring flats.
Now farms and other isolated & rural towns are a different deal. There you're no longer mass of people. You actually get to know the community around you, and people don't come & go nearly as much.