Not necessarily. We happily moved away to suburbs because we grew tired of the city noise and chaos. The child can stay outside, we have a proper backyard, there are barely any cars in the street. It was much more affordable but was a side effect rather than the main reason to move. And when both parents work from home, as we do, we are doing just fine with a single car. For those exceptional circumstances when we need to be away in different places at the same time, the cab is still nearly infinitely more affordable than a second car.