Do you have an alternative proposition? Of course the government shouldn't be encouraging drug use (note the article says these are being PRIVATELY funded) , but if it were to make everyone go sober there may be many people who would choose not to stay, which would go against the stated public health goal of the program.

There may also be a large number of DT cases from alcohol withdrawal, which would force them to be sent to hospitals, another outcome I assume the programs goal is to avoid.