Yup, your first 2 paragraphs are touched on in the link.
Also agree on your other points. I wonder how many basic functioning towns we could build for what we spend assisting or harassing the homeless and the migrants… I feel it should be straightforward to get them integrated into the economy with an organized boost in resources made in a holistic approach.
What we do with unhoused mentally ill or ones that are homeless by choice is well beyond what I’m qualified to discuss, but I imagine the bulk would welcome being helped constructively.