Yes we are probably trending that way, but I don't see how that's a bad thing. The bad thing is that rural and smaller cities were not able to compete thrive. In the end the centralization of the economy will only increase productivity, but if you want to keep them alive you need to invest in them to justify their existence. We should not be going out of our way to keep them alive, unless they have specific national interests.
If you provide policies that benefit those urban cores at the expenses of rural voters, don't be surprised if the Rust Belts revolts against your plans.
