Not to mention, of course, that many cities in the USA are also high-density. In fact, a large percentage of people living in NYC and the like don't even own a car. They are endangered and have to endure pollution and the extra charge on their rent for all the free parking and road space taken up primarily by people that descend onto the city from outside of some suburban American hell. They clearly don't want to live in that kind of place, yet they think nothing of forcing their four ton suburban onto others.
What you are seeing is people in cities realizing they don't want to continue subsidizing some suburban middle class dream and be killed and endangered in their own city in the process.