Housing First actually solves the problem of homelessness, and like the one doctor commenting says, it’s a lot easier to achieve sobriety when someone has safe & secure shelter.
From the link:
“ Of the interventions that have been tested and implemented, helping people into stable housing without precondition of sobriety, otherwise known as the Housing First model, is a compassionate way to decrease homelessness, reduce health care use, and possibly improve health outcomes. Although the Housing First model previously received broad bipartisan support, the Trump administration appears ready to abandon this approach. Doing so would have grave consequences for the health of the US.”
There are paragraphs and paragraphs talking about the cost savings of housing people, how it saves lives because homelessness causes people to die 30 years before their peers would, and that substance misuse or abuse decreased drastically after housing vets with substance abuse issues.
https://jamanetwork.com/journals/jama/fullarticle/2836034