It's really not that hard of a line to draw. Can you enjoy all of the opportunities of city life without a car? Do most people not own a car? There's one city in the US where those answers are "yes".
It's all about working with what you have available, not dreaming what could be available - would it be nice if there was a train stop half a block from my house that just happened to go exactly where I wanted? Sure! Is that going to happen? Unlikely, unless I change other things in my life to make it so.
Vehicles/cars per capita:
Europe: .56
Japan: .49
USA: .83
Gibraltar: 1.44