The problem is the vast middle ground between those two extremes that just doesn't exist in America. In Europe they seem to be more commonly called some variation of "villages". Single family homes with small lots, with larger community greenspace, and a small central hub with some shopping for necessities and a reliable connection to a larger public transit system.

Meanwhile, the American suburb seems to have been modeled after manor estates but shrunk down to a level where it doesn't make sense. Each property has more personal land, but not enough to be "self-sufficient". That slight lowering of density prevents easy walkable access to any sort of central community hub, which makes it financially unviable to have a small community shopping district. That makes a shared public transit access point difficult to implement, since there's no community hub. Everything else spirals from there, making cars (and particularly bigger cars - remember, you need to keep the "estate" supplied with the necessities from a store located a 20-30 minute drive away) the only way for a family to function.

I don't want to live in Hong Kong density, but I absolutely don't want to live in the typical American suburbia.