It’s just so hard to imagine because all our land here is getting developed.

There is a lot of development going on, yes, but damn do you have a skewed idea of what ‘all the land’ actually entails. America is fucking huge, and there is a fuckton of empty space on the western half of it. https://bigthink.com/strange-maps/nobody-lives-here-mapping-emptiness-in-the-us-and-beyond/