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The problem is that some of people's preferences include externalities. I prefer that my neighbor upstream not dam or pollute the creek that runs to my yard. I prefer that my neighbor behind me not put up a 100 foot concrete wall that blocks my view of nature. But it's their property, as you say. So people band together and decide that they want to live in a community that abides by certain rules and pass zoning laws, getting us where we are today. Externalities are a thing, and surely at least some zoning makes sense.