I definitely think we're running into some cultural difference in this thread.
There are moderately sized cities in the US where living near the city center in a safe location (even if one is willing to make the sacrifices that shootingstar points out) is not feasible. There are just not dwellings available for purchase. As US cities sprawled they did not develop residential areas near the working areas, and we're just now starting to re-develop in lots of our downtown areas for some residential use. There are also many, many places where public transit is either completely unworkable for the average person, or totally non-existent. US cities have not invested in infrastructure as other places have (other than to build roads), so for kids to learn public transit isn't an option.
We've been privileged to be able to make choices that reduce our dependance on a car, and are making yet more changes. Others aren't lucky enough to live in an area where that is feasible.
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