Some chronic back pain is severe and unrelenting when the person tries to function. They can only try to find the most comfortable position in bed and that is their life. Can't work, can't concentrate, can't do most of the things we do.
For those kinds of pain, the drugs don't even do much, other than to knock them out for a few hours. They would give anything if someone could "teach them to cope" with it.
I'm referring to pain killers being prescribed when they aren't necessary, and over prescribed when they are. For people who don't have that kind of pain that never goes away, coping without addictive poisons is the best way to avoid addiction.