The situation is a mess and there is an entire "homeless industrial complex" complicating matters here, rife with fraud, misspending and cronyism.
Every year it seems like many millions of dollars more are spent on this issue but it keeps getting visibly worse.
At first I was in the "Housing First" crowd, but after my experiences I would say I more firmly believe in "Rehab First".
A local news station released a great documentary called "Seattle is Dying". It has 10 million views since released a couple of years ago. https://youtu.be/bpAi70WWBlw
The sequel is "The Fight For the Soul of Seattle". https://youtu.be/WijoL3Hy_Bw