“San Diego is not a walkable city. Period. If you live in the Village of La Jolla and never get out of there, you can walk. Or if you in the Marina District Downtown, you can walk. But you still need a car and a parking space.”
There is a difference between being able to walk to most places and needing a car infrequently on one hand and needing a car for everything on the other hand. If the former is o.k. for you there are some places in SD that work out pretty well.
For myself, having lived in a suburb (Encinitas), followed by a walkable college town in North Carolina, I’m finding my current area (Mission Hills) to be a nice compromise.