[zozbot234]

Genuinely dense cities basically don't exist in the U.S. The average "dense" city downtown in a U.S. city is broadly comparable to the worst car-dependent suburban or exurbian hellscapes of Europe and East Asia, and things only go worse from there. City downtowns near the East Coast are an exception since they were built in colonial times or thereabouts, so when you think "dense" you should really think of e.g. the densest boroughs in NYC.

[drnick1]

Yes and that reflects historical and cultural factors. Cities in Europe were largely built in the preindustrial era. In the U.S. there is just so much more space; it does not make sense to build small or dense. Transportation habits just reflect this.