Humans are fucking difficult. It doesn't mean you cannot help folks and provide mental and physical health services. You'll probably get better because you have trained people that have dealt with addicts before instead of the average homeless shelter employee/volunteer that has little to no education to back them up - merely a will to help others.

And no, it won't be perfect. It rarely is. But it is a much better start than the shitholes we call homeless shelters now. Stop treating folks like animals, even if you look down on their lives.