Any alcoholic (or borderline) can change and make excellent contributions to society.
My 'non educated' grandmother used to always say to me when addressing family members, especially children with problems" "don't throw the baby out with the bathwater".
In other words, keep the baby (give them a chance) after the dirty environment (drugs, booze, partying, etc.) is removed, you just may like what's left. But certainly get rid of the dirty water.
Amazing the wisdom that seniors, without book knowledge, have.