Earlier quoted context omitted.
They are greatly exaggerating. One tangible advantage to living somewhere expensive with higher salaries is that anything you can buy online is effectively that much cheaper. An iPhone costs the same in Arkansas as in San Jose, so you'd end up working many more hours to buy one in AR than in CA, on average. Yes, housing is more expensive. A lot more. Everything else is way cheaper.
Thank you, so many people like to go about cost-of-living and pretending things are equal because of that, but the vast majority of goods people buy are not priced that way, and in truly remote places the cost of goods actually go up. The land or housing might be cheap, but pretty much everything else costs the same, so the lower paying job still hurts.
I will say though that travel is the main one that’s obviously independent of where you live (at least mostly). So that’s kind of nice.