welcome!!!
Ditto what Ananda said, alcoholics/addicts not in recovery don't have choices.
That being said, we have to treat the alcoholic/addict like they do have a choice. The only way an alcoholic/addict gets over denial is when they hit a bottom of some kind, removing ourselves from their active addiction may not insure that they hit a bottom, but it will insure that we aren't contributing to their addiction.
If it helps you to believe it's not a disease, good.
Keep coming back, you'll find a lot of support here.