"Land-usage" is such a narrow-minded way to think about the implicit wants and needs of society. You sound like you've never been to actual cities, or never got your head far enough out of your arse to actually experience one.

North American suburban sprawl already proves that "enough land for us all to live comfortably" is a terrible way to live sociable lives and drains the economy due to massive swathes of those lands being used for roads and the maintenance of said roads.

I implore you to take a trip to almost any European city, and see for yourself what actual "comfortable living" for most people looks like.