That is correct. An abstract spherical city in vacuum might be able to lower prices by building more. Or it's possible in a fantasy scenario where you suddenly

That is correct. An abstract spherical city in vacuum might be able to lower prices by building more. Or it's possible in a fantasy scenario where you suddenly drop a million housing units onto a city from orbit. But cities don't exist in vacuum. And building new housing is always slow, so you can feasibly grow housing stock in a large city only by single-digit percentages YoY.