There's a group of people that believe that most current "dense cities" in the united states are very poorly designed. So, when you say "dense cities already e

There's a group of people that believe that most current "dense cities" in the united states are very poorly designed. So, when you say "dense cities already exist", that group hears "your concerns are invalid/useless". Conversely, "making cities harder to get around when not on foot" also means "making cities easier to get around if you don't own a car". Individuals who live in cities and don't have a car are comfortable with this. Or, they live in cities and a car is not their dominant method of travel. This whole issue is extremely complex, and not amenable to a simple solution, like "making cities easier to get around on foot" or "make it easier to drive around a city". Jane Jacobs's "Death And Life of Great American Cities" is a fantastic (and beautifully written) exposé of the topic. Believe it or not, I finished the book this morning.