What family of 4 of those you want to be your neighbors are going to give up their 1/4 acre so some farmer can grow the wheat your family consumes? Corn? Soybeans? Beef? Swine? Poultry? Vegetables? Fruit?
If you want to live standing-room-only why don't you just move to Hong Kong or somewhere similar now, so you can enjoy the crowd immediately.
Have you ever been anywhere in the US other than your neighborhood? If so, you should have noticed there are more than a few square miles that are not suitable for habitation, or even cultivation. Parts are under water. Parts are deserts. Parts are at elevations or slopes unsuitable for residences or cultivation. All of these conditions should change your allocations of land to the masses you want to live next to.
Really are you truly just trying real hard not to get it? The population of World is nearly 7 Billion the Population of the USA is just 5% of that. The example shown would give pone person an area 13 TIMES THE LAND MASS THAT AN AVERAGE AMERICAN FAMILY OF 4 LIVES ON. AND THAT IS 20 TIMES THE AMOUNT OF PEOPLE THAT LIVE IN THE USA. We can double our population in the USA and everyone could have 5 times more land mass than they have now and still not live in areas not suitable for daily living with plenty left over to farm and for recreation and for retail and manufacturing space AND still have all the national parks etc.
Are you getting it now Sparky? The USA is not even CLOSE to being overcrowded no matter how hard you or anyone else tries to make it so with verbal gymnastics. BTW I've been to goodly portion of the USA. I've driven from the East Coast to the Rockies several times. That is why I smile and giggle every time some yahoo spouts off about overcrowding in America. Drive through parts of Kansas or New Mexico or Nevada or North or South Dakota and you can drive for miles on end and see no sign of Human habitation. Just open country.
The USA is huge and there is damn few people in it by comparison. And that my friend is an undeniable fact.