The dependence on cars creates very unhealthy political climate (wars, climate change denial) and creates obesity. Unwillingness to comprehend the issues, created by cars is actually a cultural defect of the nation. OTOH, preference for suburban lifestyle is also a purely cultural phenomenon, and is caused by the fact people prefer living arrangements the grew up in. I grew up, for example in a dense Soviet city, and find big house with a yard absolutely repulsive.