Sure you can "nearly every single person on the planet plenty of room to live in Texas" but they would be devoid of infrastructure and it would be incredibly expensive to service people's homes if they're spread out across the states. It's a cop out to say 'there is plenty of land' when it requires a hell of a lot of work to bring it modern services. If you think your simplistic land argument is a good one you should revisit other beliefs as well.