Repeated alcohol withdrawal is more harmful than repeated drunkenness by a long shot, and each one could kill, and very likely so. While obviously all destructive drinkers (and on another level all drinkers period really) should quit, quitting things doesn’t always happen on other people’s schedule and reducing the harm that’s done in the interim can improve future quality of life greatly. As far as doing this at your expense, well, addiction is a thing that can hit anyone and does a lot of damage to the community around the person it hits.