> If there's no way to procure any drugs, it takes away a lot of the pain and anguish you feel coming off of drugs.

Or the fact that you're not longer in the environment with its stressors that cause you to seek out drugs in the first place? Lots of people sleeping rough go for drugs of any kind just to be able to put their mind to rest.

Finland shows this with its "housing first" policy, giving people a home is a relatively easy way to get them off of drugs.