It’s either, build on new land, or tear down and rebuild bigger on old land.
Those CFDs you dislike were a major driver in CA’s economy. Without he CFDs, CA would look very different and maybe not the way you think. The population would still come maybe, the jobs would be there, maybe. Those restaurants and shopping most like, those trendy clubs and bars? Doubtful.
The CFDs were mismanaged and pork lined up all sides of the trough, but without development, CA would shrivel and die. I suppose you could move the valley of the dirt people into the downtown condos, but that’s a very different experience, and frankly, California isn’t ready for the NYC micro-apartments.