I only got a driver's license when I got married and my wife insisted, because she didn't want to the only one driving the kids around. (She mostly insists that she drives, though.) I still commute by bike.
In a well-designed city, most people don't really need a car. Some do; some jobs really do require a car. My wife still travels to all corners of the country regularly, so we do have a car for that, but for me personally, a car would be a pointless expense.