So what if they get addicted....I listened to a soldier last night who had both legs amputated and he has no scrotum as a result of IED’s.........he was on some serious drugs even those who cause you to hallucinate....all three drugs he had to be weaned off from one at a time...... And that’s what you do to get them off them.
I don’t see your point.
There are many people whose pain will never abate. Denying them treatment is a great moral evil, even if they are addicted to the end of their days.