By preventing some areas from getting very dense, you are forcing the rest of the city to get dense to compensate. Cities don't have to be uniformly dense, and

By preventing some areas from getting very dense, you are forcing the rest of the city to get dense to compensate. Cities don't have to be uniformly dense, and probably shouldn't. Cities like New York and Chicago have very dense portions but also have fairly less dense areas. And those dense areas are more affordable than if no high rises were ever built. Every high rise buildling in Chicago or New York means dozens of single family homes don't have to be explanded and split into 500 sqft condos. They lower cost of living. And they reduce urban sprawl. By isolating people and businesses that want super dense areas, you actually give the rest of the city more breathing room.