San Francisco has intentionally avoided this wonderful, easy solution because the city is filled full of fake liberals and progressives.
[1] "In August 2007, the US Department of Housing and Urban Development reported that the number of chronically homeless individuals living on the streets or in shelters dropped by an unprecedented 30 percent, from 175,914 people in 2005 to 123,833 in 2007. This was credited in part to the "housing first" approach; Congress in 1999 directed that HUD spend 30% of its funding on the method."
https://en.wikipedia.org/wiki/Housing_First
https://endhomelessness.org/resource/housing-first/
[2] https://www.theatlantic.com/business/archive/2013/08/the-ast...