While I'm sure all of us who hang out here would agree that drinking beer is enjoyable and we wouldn't prefer to stop completely, I think that of course it's not REQUIRED to live a healthy and happy life.
If the thought of having issues due to drinking is concerning to you, why not revel in the fact that you have a choice, and that MANY others don't really drink at all and live very happy lives. What you need is something that you enjoy in place of brewing. There are an unlimited number of hobbies out there. I know, I've tried them all! (My wife says!)
I don't think it's wrong to brew up a few batches of special beer and save them for special events. Whether you can or not is up to you. For me it's tough to find anything else to drink that I enjoy as much. Soda is too sweet and sugary. Tea is ok sometimes. Coffee is generally a 1 cup a day in the morning for me (caffeine sensitivity). I don't like fruits or fruit drinks.
Or there is an ALTERNATE plan: Brew low gravity beers like Scottish Ales, English Milds, and whatever. Take the ABV down to less than 3.2 and you have effectively halved your alcohol intake. Something to think about, anyway. A lot of times I just want a lighter beer anyway. A well made Scottish /60 is really good too.
Bottom line is that there is nothing wrong with quitting the hobby or alcohol altogether. I'm sure nobody would think less of you for it, and if it improves your enjoyment of life, then it's that much better.
I know what it's like to hit that "tipping point" sometimes when you don't really need one more beer, but it's not bedtime and you are just buzzed enough to talk yourself into it. The one nice thing about kegging is being able to pour just half a glass after work, then another half for dinner, and it's always fresh and chilled. Much harder to regulate with bottles when you are likely to pour and drink a whole bottle at a time.