No, I’ll take responsibility for your confusion here; that map isn’t showing the the net loss/gain of every county at once.
It’s showing the net loss or gain of people to/from one county; Maricopa County Arizona.
Ergo; were able to track, almost to a man, the movement of people from one county to the next.
Thanks to this tool: The Census Flows Mapper
Here’s Cook County BTW:
And here’s the whole country projected for 2010-2020
As you can see, plenty of rural counties have either stagnant or falling populations.
Meanwhile, the majority of the unemployed are in the urban centers.
So long as the unemployed in the cities have no desire to move out to rural areas to find work, rural areas will continue to need migrants to fill their labor shortages.
If you deny migrants that work, the consequence will be that we import our food. America, for the first time ever, will become a net-importer of its crops and meat.
We’re already borderline as it is.