[feet]

Well nonalcoholic beer does exist, but I assume you aren't talking about that.

I personally find libraries incredibly relaxing, but I assume what you mean by "it's not the same" in that a library doesn't serve highly rewarding GABAergic drugs.

People enjoy drinking alcohol because it is rewarding and most have learned to like the taste through the association of that neurological reward. That's generally what enjoyment is, association of reward with an activity. There are many other activities and compounds that are just as rewarding or relaxing but society is conditioned to accept alcohol as the default it seems, at least in some communities.

As for your last point, that is absolutely not true from my experience. Whenever I discuss the risk of cancer that's associated with alcohol consumption the other person generally has no idea, that has been over 90% of my conversations on the topic.