My wife and I live in San Francisco, don't have a car, don't have a garage. Are you saying I should be forced to pay for not just one, but actually two spots?
Square footage in San Francisco is extremely precious. If people aren't willing to pay for parking I don't see why it should exist, or why people without cars should be forced to pay for it.
To be clear, I'm against parking maximums as well. If people are willing to pay for a spot, let them do so!