Hardcore frequent drinking is bad for anyone. I like to have some beers with friends on my weekend (monday or tuesday) and play darts and trivia and eat and laugh and have a ball. I like beer. I realize alcohol is alcohol, but liquor will destroy you quicker, especially if your beer consumption is casual.
I drink a few beers, get a buzz, laugh my a*s off, and then wait usually about a week to do it again. Sometimes, i'll go two or three weeks without a drop. It's a personal choice. If someone wants to have fun but possibly live a shorter life (within reason, i'm not advocating purposely destroying yourself), that is up to them. It is also up to them if they don't enjoy or want to consume alcohol in any form and live some extra years.
I'm 35 and in amazing shape. My hardcore drinking/partying days are behind me, but I do like to get a nice buzz with some good beer and be social and have fun, to really enjoy what life I have left. I went 100% alcohol free for a little over a year. My conclusion was that being 100% sober for extended periods of time is extremely boring, and watching those around me who do what I do now (but then), wasn't any fun. Yes it's possible to live alcohol free, I have done it. But it's not for me.
My lungs were going to kill me before my liver or pancrease were going to. I have pretty much taken care of the lung aspect with OO. Within reason, I feel a life lacking what you consider fun, is't really living. Of course others might feel differently, it's their call. So far all my blood work, liver function tests, weight, and everything else has been very normal to very good, so I guess i'm doing something right. Not to mention a different CF could 100% abstain from drinking, and die due to other CF issues, and I could live to be 50+ and socially drink.