Now re-do your math but take into account where people actually live. People aren't equally distributed across the earth, they live in majority in cities where

Now re-do your math but take into account where people actually live. People aren't equally distributed across the earth, they live in majority in cities where space is a major problem. Not just "high density" cities like New York, just cities. "It could be more efficient", it is already more efficient in a lot of part of the globe as not every countries created themselves a society that depends on every single person having a car to be able to go to work. Do you mean those people basic desires are not fulfilled?