You just said that if building codes were removed there would be "little difficulty" in doubling the density of San Francisco or tripling the population density of Mountain View? What?
Like there's no logistical issues involved of doubling or tripling the capacities of roads and utilities, figuring out where the trash is going to go, where the water's going to come from, etc. Like there's no reason a city might reasonably decide against unlimited growth.
This is so far removed from reality I don't even know where to start. At the bare minimum, if you're going to call me disingenuous at least make a case of why.