I interpret that as more like parents/siblings/cousins/close friends live in the neighborhood or close enough that they can be depended on and vice versa during illnesses/extended work hours/whatever else.
>Spend 10-15 years of your career, build that nest egg, and then return to your hometown if you really dislike the Bay or NYC. You will have reached financial independence and that gives you the flexibility to take a $75k-120k TC dev role (at that pricepoint you are safe from offshoring if you are a Bay+NYC tier developer).
You might have reached financial independence, or you might not. You might have been able to meet a suitable life partner in that location, or might not. Maybe you would have found a more compatible partner closer to home, via your network of family and friends. You might be able to reach financial independence before having a baby, or you might watch your prime child rearing years pass you by.
I have lived it, and I have seen my peers live it. I know lots of families split between NY/Bay Area/Seattle/LA/Boston/London/etc. The family members see each other on special occasions, but it doesn't have the same vibe as being part of a family or friends circle that interacts at least weekly if not daily. Everyone is rich, and has fun together for a couple nights of food and drinks, but who is really there for one another when shit hits the fan? There is no shared struggle, only shared vacation, and that cultivates only weak social bonds. But then again, who needs strong social bonds when you're on the way to $10M+ in the brokerage account?