It's important coz otherwise capital will decide which way the correlation flows and big money is (literally) invested in homelessness being caused by mental il

It's important coz otherwise capital will decide which way the correlation flows and big money is (literally) invested in homelessness being caused by mental illness and drugs. This is a question a lot like "does hiking the minimum wage cause unemployment?" in that a lot of private wealth hinges upon the public believing a plausible falsehood. Rigorous scientific study can offset that.