[haaz]

Public transport simply does not work at low densities, and improves with density. Car based societies are, almost by definition, not walkable. Dense, walkable cities are cheaper, healthier, prettier, greener, and more productive.

There are problems that come with density, like crime, but there are solutions to that other than low density. I encourage you to explore life in Asian cities, especially SE China or Singapore, to see how great low crime, high density cities can really be.