No one is arguing that you would have to take public transportation or walk everywhere. They are just saying that it is good if where you live is walkable. I also live in Southern California and I would say that a lot of most expensive places to live are expensive because they are more walkable. You could live in downtown La Jolla or by the beach in Santa Monica and walk around. You could also own or rent a car and drive to Lake Tahoe. It's not either or.
East hollywood probably sees the some of the most foot traffic in southern california and rents are relatively affordable by LA county standards. Chances are the working class areas in sd are similar I imagine where you see a lot of people walking, biking, or taking the bus to get to work. Of course this isn’t “urbanism” in the way that upper class people consider it, but it exists.
