Well then please feel free to refute any of what I said.

Here's a breakdown of median income by county: https://en.wikipedia.org/wiki/List_of_United_States_counties_by_per_capita_income

See how the lowest median incomes are mostly concentrated in the rural south with incomes increasing around the counties that have larger cities?

And here's data as of a few years ago again confirming higher rates of poverty in rural areas and greater job growth in metro areas:

https://www.pbs.org/newshour/nation/six-charts-illustrate-divide-rural-urban-america

Older study stating urban tax money subsidizes rural counties:

https://www.ibj.com/articles/15690-study-urban-tax-money-subsidizes-rural-counties

Another article with citations confirming more of the above:

https://www.brookings.edu/research/why-rural-america-needs-cities/