Sure, suburban development was facilitated and accelerated by the portfolio of government initiatives (highways and home loan programs), but at the core is that people were dying to get out of cities, buy a car, and have their own serene little castle with a lawn and driveway and no shared wall.
And this appetite continues to be the dominant one. While Americans seem to be rediscovering the value of human oriented streets that Marohn champions, they aren't willing to turn away from the suburbs, the way they did cities 80 years ago.
Perhaps Marohn's predictions regarding government financial collapse will come true soon, or perhaps traffic congestion reaches a breaking point that forces a change. But until then, and as long as they can afford them, Americans still want spaced out single family houses that spread out across the fruited plain.