well , i think the big difference there is someone who is at risk for alcoholism obviously if they went to rehab they have some reason such as problematic drinking, not everyone has issues drinking or becomes addicted to drinking or substances.
there is a big difference between use , and abuse
chances are if you went to rehab you were an abuser, meaning you most likely cannot have a drink socially without feeding the demon.
but that doesnt mean someone else cannot responsibly have a drink with dinner and not have it affect them