Are they really? I can own a 6000 square foot house for $2,500/ month in most of the country. Try doing that in Europe.
The aspiration of owning a 6000 square foot house probably costs the American a lot of things the European _would_ value: not having to be so career-focused to make enough money, not having to take on as much debt, living in a higher-density urban area which makes other things mentioned in the article possible (taking the train, going to cafes, casually stopping for groceries, all the while being surrounded by other people)...