@Foofie,
In general, living in the city where you do not need a car, is also not ideal for people with children.
It is just a different culture. Single, married couple no children - living in the city, no car is awesome. You walk out the door and everything is right there. You can party your heart out and no worries about driving - you walk home. With kids, like you said there are more committments, a yard is nice, a neighborhood where the kids can play with others, etc.
Just a different lifestyle. I've lived both and they are both good - just different.