Your post confuses me; you start out by talking about your family members who drink and drive and compare that with RL's penchant for drinking and driving. Fair comment indeed.
Then you start to discuss alcoholism into the mix. But why?
Someone who finishes the day at the bar does not make them an alcoholic.
Now if you have other reasons to believe that this habit is related to other red flags of alcoholism then I understand that:
i.e., Do they drink first think in the morning, drink on the job, miss work, perform their job poorly, drink when no one's looking, drink in secret, are they unable to stop?
Believe me when I say in many countries, people go to bars and pubs after a day's work, and there is nothing in that. I live in France, everyone drinks wine and Pastis daily, believe me. These people, in general, are not alcoholics.
Drinking and driving, absolutely abhorrent. Going for drinks after work, even daily, does not make you an alcoholic. We call it going for "sundowners."
And from the way you lovingly describe your family members, unless you could give evidences to the contrary (see questions), which I would not expect you to share, then I would ask you to reconsider your thinking of them as alcoholics. You describe them as pillars of the community, which I have no doubt they are. What they are is foolish and dangerous but that is a far cry from alcoholism.
Sorry if I offend, it is not my intention. You sound like you love your family dearly. IMO