I mean, I don’t disagree with the principle (haven’t read it to see if it’s actually feasible though).
Either a homeless person suffering from addiction and mental health issues seeks help, and gets better, or they can’t get better and go to prison where they are sheltered and fed and kept off the streets where they probably would die in a few years anyways, or commit a crime that may harm someone and go to prison anyways?
It depends if the state is willing to pay for that help, because if not it’s just a law to shuttle everyone into prison.