The population of San Francisco is about 800,000. They have about 440,000 public parking spaces. 72% are free.
As I've written several times, cars aren't really the problem, it's parking, specifically the fact that despite what people who believe that there should always be a free spot precisely where they want it think, there is often an oversupply of parking even in urban hellholes. Parking takes up space, reducing density and the walkability of areas. Parking requirements raise the cost of construction.
