A weakness in part of America is a weakness for all of America. It works this way with the outside world too - our housing shortages are part of a global problem. We are all in this together. Framing the issues that the world cities have internally as something that isn't a problem for people living elsewhere is just denying that we live in a connected society.
One groups problems affect the other groups.
> And the ones with the worst housing problems have the most restrictive real estate laws.
Do you have a citation for that? I don't believe it's true.