Alcohol and drugs turn us into super-people. Pain pills turn us into workhorses on the job. Alcohol gives us liquid courage. Take those away and we are left with something unpleasant.
Without the alcohol, we may not know how to socialize. Or we may discover we really don't like the people we tend to socialize with. Maybe we discover that we actually hate our job or that it is destroying our bodies or minds. If those things don't change, then the impetus to still use remains. Relapse then becomes, probably, a matter of time.
Take the pain away, and the urge to use becomes easier to manage because triggers are being removed.
In a word, that's what I do when I sit down with someone to help them change their relationship with alcohol or drugs. All substances are pain-killers, however they effect the brain. Sobriety brings pain front-and-center.
The best relapse prevention really is a life worth living.
Let me help you find that life.