My position doesn't apply to all, or even most suburbanites, nor is it entirely critical. I don't know why you're taking offense to it, especially offense that you haven't bothered to refute.
Cul de sacs are insular, and that's considered a selling point of them. I'll grant that they're not quite as extreme as gated communities, but that they exist for the purposes of insulating one from traffic otherwise associated with more frequented byways. That isn't a contrivance, it's their stated purpose. It shouldn't come as a shock that insulation from use as a thoroughfare would extend to insulation from outside contact, as that's the obvious result.
Cul de sacs are insular, and that's considered a selling point of them. I'll grant that they're not quite as extreme as gated communities, but that they exist for the purposes of insulating one from traffic otherwise associated with more frequented byways. That isn't a contrivance, it's their stated purpose. It shouldn't come as a shock that insulation from use as a thoroughfare would extend to insulation from outside contact, as that's the obvious result.