Would you be opposed to properly detoxing a person before his/her introduction to God?
If the addict does not know God, the addict will find God at the bottom of the darkest hole.
He, at such time, will either take God’s outstretched Hand, or he will remain at the bottom of the hole, where he could very easily die.
It is up to the addict to make this choice and take this action. No one else can do it but him.
Whether or not you detox the addict is not relevant, because he is waging mortal combat with a demon that not only resides in him, but is a part of him.
You cannot lock that demon away, much as you may want to.
There are indeed people who will be beyond saving. Sometimes the demon wins.
If the addict does not come to the realization that he wants a better life for himself, then he will not have one.