Because what you do affects your neighbors. Why should I have to move if you decide to no longer use your bathroom, and instead build a make-shift outhouse on

Because what you do affects your neighbors. Why should I have to move if you decide to no longer use your bathroom, and instead build a make-shift outhouse on your property line by my home's entrance? Or you decide to rent to 4 families in a 1 bedroom/1 bathroom apartment? Also, watch what happens to "your" property when you stop paying property taxes for a number of years. There is also the concept of the "commons", which we share. https://en.wikipedia.org/wiki/Commons https://en.wikipedia.org/wiki/Commons If you were advocating for separate planets, then yes, I would agree.