The core problem is that there are a large contingent of homeless drug users who just want to be left alone so that they can continue to be homeless drug users. Any services given to them will just be redirected by them towards enabling continued drug use. It's like an inbuilt self-sabotage that is totally alien to regular folks, but the choice way of living for those with it.
This isn't talk about much at all, because the story book tale is that homeless people are just regular people who are down on the luck, and if we could just show them some respect, compassion, and spare a few resources, they'd be right back on their feet again. But that story is just a fairy tale used to sell a feel good idea, reality is way more fucked up than that.
The people who end up in truly dire circumstances have backstabbed everyone who ever trusted or helped them. They have burned every bridge, and nobody they know wants anything to do with them. All to feed a ravenous addiction.
>The people who end up in truly dire circumstances have backstabbed everyone who ever trusted or helped them.
Or their family backstabbed them, if they ever had one (this article has a case study on someone raised out of an orphanage). Or this continually individualistic society has loosened support networks so you never truly got "friends". Or you simply got priced out because rent became 3k and you're not a silicon valley engineer.
Not all homeless people are drug users. Just the ones you remember most.
They're refusing treatment because they're addicted. They're refusing shelter because the shelters have policies (like not using drugs, or from the article; no pets) that they can't meet.
A lot of them have been abused by the institutions that were supposed to help them in the past, so understandably don't trust that they will be helped by similar institutions now.
Any of us, put in the same situation, would find it impossibly hard to deal with. I was lucky; I had friends who could help and I got lucky with some work that allowed me to get out of that situation. If I'd not had that luck, I could easily have gone down the same road.