I think it depends on what degree of parking we're talking about here, but there are downtowns where the city core is full of large parking lots. That situation

I think it depends on what degree of parking we're talking about here, but there are downtowns where the city core is full of large parking lots. That situation makes walking basically impractical because even two adjacent businesses will be a block apart, and everything becomes very spread out. Eliminating most of that parking leads to higher density which is naturally more walkable. The more trips taken on foot, the fewer need to be in a car or other form of transit. Sure this doesn't serve the suburban crowd as well, but it's a city, not an outlet mall.