They found that areas with high housing costs are correlated with high levels of homelessness? Well of course! People want to live in desirable places and that

They found that areas with high housing costs are correlated with high levels of homelessness? Well of course! People want to live in desirable places and that both drives up the cost of housing and attracts homeless people at the same time. Remove that confounding variable and you’re left with addiction and mental health.