I also feel for you. My husband has a lot fo beer on Friday and Satyrday nights, and 2-3 most nights fo the week. I often slip or relapse by first grabbing a few of his beers on a sudden urge after a period of sobriety. There is a case or so of Harpoon around pretty much all the time. I was mostly a wine drinker but like beer, and it is hard having it around all the time.
Moreso, it is pretty enlightening to see a drunk through sober eyes. And I agree with it being hard to have a leg to stand on when they put up with us for so long. I do tell my husband I worry for his health with how much he drinks. Ask him if he feels okay the day after he might pass out on th ecouch on a Saturday night. But, they have to choose for themselves.
It would be easier to do it together, and better for a relationship, but we cannot make another person be ready.