The mental health treatment has to come first.

No. Housing comes first. You cannot treat mental health or addiction while the patient is experiencing the inhumane conditions of homelessness.

the LAST thing you want is to give a junky unsupervised privacy to shoot up as often as they like. Apartments often turn into local hubs for dealing and sex work. This attracts all kinds of unsavory characters and crime

So you think the streets are better? Believe it or not, all this still happens on the street, except now there is no guarantee of food, shelter, safety, or property. I'm sure the constant threat of starvation, death by exposure, getting robbed, or being sexually assaulted is really beneficial to mental health. Do you really think being on the street stops addicts from using as much as they want? No privacy on the street? These people are already invisible. And no, if you don't have a door that locks, you don't become immune to overdosing.

Shameful.