The 3 Cs extend to anyone else,
we can't cure anyone
we can't control anyone
we didn't cause the issues of anyone else...
Since I left the XABF I don't interact with addicts. Neighbor has a party with drunks? I use earplugs. A party is organized at the home I live in? I leave. No one else in my family is an addict thank HP. I sometimes go to bar or so but this happens twice a year. Once a coworker was drunk and started acting friendly with me. I said "I have to go" and left to talk to someone else.
My life has improved very much since I am aware of, alcoholics, drunks, jerks, toxic people, and avoid them. I believe when you feel better about yourself they don't "appear" as much as they did before. I guess they don't sense you want to listen to them, hug them, kiss them, drink with them, try to fix their issues, listen to their BS, sleep with them... so why would they talk to you if they can't get anything from you..?
I don't know if you are talking about other members of your family but I would recommend no contact or very limited contact... just because they are ducks you don't have to listen them quack.