I did not claim that being laid off for those Citi employees would go unnoticed. Their standard of living would drop, but they would not have to live in a tent. There are many towns with low cost of housing. If those are too expensive to buy, one can rent (and probably should anyway, just to figure out the new area). The ratio of median house price to median household income today is a little higher than, say, the average over the last 50 years, but it is not 5 times higher.
There is indeed plenty of housing scattered around the flyover counties. For sure, it is less pleasant than in a rich suburban town. Those small towns do not have walkable downtowns or many cafes and eating out means a basic diner (they do not have good restaurants and entertainment precisely because affluent families moved to metros). You are very unlikely to resell it later for a massive profit. But the basics (water, sewer, electricity, groceries) are there and one can certainly live there if laid off and not envisioning good prospects for the next few years. My 2c.