Contingency around wealth occurs in myriad ways. It's not like other blue cities are not wealthy. Obviously the financialization of the economy is quite evident in New York in particular, as it is in places like London or Shanghai or Hong Kong. This was often preceded by times when these cities were also notable as ports and more "real" (to use your phrase) centers of trade. Other blue cities do well for different reasons. The fact is the kind of "real" work you have described has been devalued over a long period of history, and going back to that is not desirable. Even in Roman times, Rome was not were the food was made. If you are a country today, as back then, were the greatest thing you can achieve is "food" and "building" you are considered a weak society. These are things humanity has already solved for centuries ago. Since the dawn of civilization. That's what civilization is. Advances since have always come with some degree of "financialization" or "service economy". If that makes you upset then you can give up the medicine, peace, science, etc that comes with civilization and go back to when "real" work was extremely valued because you had to kill for your food everyday. What could be more "real" than that?
I understand the resentment of poverty to wealth. This is not what I am referring to when it comes to Alabama and New York. The cultural resentment towards NYC in particular from these places is egregious. It's not about wealth, it's about religion, it's about diversity, and it's about demonization.
It's become such a thoughtless exercise on the mainstream right to essentially claim that people in New York City are not "real Americans". That they don't have "American values". To the point where when people like Ted Cruz get openly challenged on this it feels like something of a revelation. The moment Trump turned another such diatribe against Cruz was another strong signal he was going to take over that party.[1] And yet this lazy rhetorical convention has not retired. It is disgraceful. Why do major political candidates in a system with only two parties engage in such transparent attacks on a city of millions of their fellow citizens? Obama made one little "cling to their guns" comment and was forced to prostrate himself in apology. Meanwhile in these "red" states treating New Yorkers or other blue states as almost satanic is par for the course. This is not the resentment of wealth alone.
It would be one thing if it was just empty political rhetoric. But it is not. People in New York do not obsess over people in Alabama. We don't fantasize about sending our national guard into their states, or stealing their elections, or deporting their populations who don't look like us. We don't obsess about crime rates in their cities, which are worse in many red states per capita than our own. We tolerate the fact that most guns used in inner city crime, our so-called "gun free zones" come from guns in poorly regulated red states, as if the southside of Chicago houses weapon manufacturing factories. As far as I can tell the resentment from people in Alabama or Arkansas and the like comes from wanting to return to an age where they could pelt young black girls with hatred and abuse for wanting to go to school and having to suffer the federal government sending troops there to tell them to act like the civilized society they claim to be [2]. If you do not acknowledge a very specific type of hatred has been festering in these places for sometime I would suggest you are not paying enough attention and need to reacquaint yourself with your history. If we didn't have to protect these people the resentment would not exist. When Southern plantation owners could depend on enslaved labor, the gap between the North and the South was not so vast. Many of the framers understood in the long run this was not sustainable, and that a civil war was likely inevitable if "all men are created equal" was to actually succeed.
Along these lines, something we may wish to consider in the future is returning to a spirit of federalism, that is, a weaker federal government and more autonomous states. That is, provided retrograde states like Alabama or Arkansas do not once again use such a framework as a pretext to perpetuate a system of racial slavery onto their own citizens. Perhaps the average person in Alabama has learned enough that for the time being the best thing for them is to leave them not only more in charge of their own affairs, but far less in charge of our own. Who will they blame for their condition then? If the states somehow replicated a civil war style secession in peace would Alabama suddenly be enriched? Would the price of food suddenly disobey the laws of demand and supply? Is their plan to make no money at all? These are people who don't think tariffs affect prices. Then when their farmers predictably lose money blue states get robbed to pay the subsidy. All while this constant drumbeat of cultural war emanates from these places.
Imo we don't need to bend over backwards to indulge their resentment. We have suffered these types of people long enough. We already have debates within NYC about wealth and poverty. We don't need to add the ingredients that come from places like Alabama or West Virginia. Hillbilly Elegy style takes would be a little more palatable if people like JD Vance didn't come in and transparently serve the Epstein criminal class and call Americans who don't want their neighbors rounded up like dogs "domestic terrorists". I'll take John Brown over JD Vance any day of the week.
[1] https://www.youtube.com/watch?v=TM6qRl3dSME [2] https://en.wikipedia.org/wiki/Little_Rock_Nine