The market thinks higher profitability is a no-brainer, yes. It is more profitable to build an apartment block and collect rent from thousands of people than it

The market thinks higher profitability is a no-brainer, yes. It is more profitable to build an apartment block and collect rent from thousands of people than it is to build maybe 30 monoplexes on the same space. It is even more profitable when developers don't have to waste space to accommodate massive amounts of parking, or follow any of a dozen other needless zoning laws. Rome was not built in a day. The market won't solve everything, but in the limited circumstances where it very obviously can, we should abolish the laws that forbid it.