Most of these constraints are there because there are a lot of humans and there is really no such thing as unused land. Land that isn't being used commercially

Most of these constraints are there because there are a lot of humans and there is really no such thing as unused land. Land that isn't being used commercially is either someone's investment or actively bring reserved for nature. Life as described in the article isn't available for a meaningful amount of people since it requires an enormous amount of space per person. That's a large reason why we stopped being hunter gatherers and started farming. It's boring and reduces your freedom, but if you want to feed billions of people it's needed.