Because density is inherently more complicated and expensive to build and maintain. This is also why there aren't "cheap" skyscrapers in suburban/rural areas.

Because density is inherently more complicated and expensive to build and maintain. This is also why there aren't "cheap" skyscrapers in suburban/rural areas. Because even when it's easy and 100% legal to build by-right, any density above 2-3 stories is still inherently really expensive.