Europeans tolerate more onerous restrictions on individual liberty than Americans do. The combination of high degrees of individual liberty and high population density tends to produce a less predictable, sometimes disheartening and sometimes dangerous environment that wealthy people in the U.S. tend to prefer not to live in (at least after their young adulthoods).
The point is that there are good reasons why most Americans with the ability to do so choose to live in areas low enough in density that cars work better than public transportation and that America cannot simply copy Europe's urban planning without also copying some of Europe's laws and attitudes regarding individual liberty. (And laws and attitudes are hard to change.)
The point is that there are good reasons why most Americans with the ability to do so choose to live in areas low enough in density that cars work better than public transportation and that America cannot simply copy Europe's urban planning without also copying some of Europe's laws and attitudes regarding individual liberty. (And laws and attitudes are hard to change.)