If they're solving all the other problems in these addict's lives - if they're able to be functioning members of society - isn't that enough? Why would you upset all that progress by making stopping drugs priority #1?
It's like CBT but in reverse.
Given that the FDA requires no long term testing of any nature, it seems contrived to pick on one longterm prescription as flawed because you have some kind of problem with not blackmailing people into treatment they don't want and that isn't helpful.
Forced therapy is a form of punishment, and the real intention behind mandating it for something you could just manage is to try to use the addict as an example of applying the stick to people with the "wrong values" for the rest of society.
The result of that is cross generational addiction problems because prisoners have children, children get traumatized by stressing their parents and trauma is addiction predisposition.. "a shitty life."