Even if you were to do that, parking has a larger footprint than habitation. Or whatever you want to call existing in a space. For example, if I go to Chipotle

Even if you were to do that, parking has a larger footprint than habitation. Or whatever you want to call existing in a space. For example, if I go to Chipotle for lunch, I will go and park my car, go inside, get in line, order, blah. My car, and everyone else's car will take up 9x18 units. If it's busy, you could have a line 10 to 15 people deep. That's 1620 sq ft of parking for people who will be occupying about 360 sq ft on the inside. (Assuming 10 people all taking up a 6x6 block).