I'm confused, you paint a picture in which the majority drink moderately and then say "likely not healthy" but in your example 90% of the customers, the vast majority, don't have an unhealthy relationship with alcohol.
So if you have a relationship with alcohol it is most likely a healthy one, and it's "addiction all the way down" for... a minority.
Yeah, well, that majority is likely buying alcohol for events, for celebrations. Not so much a 'relationship with alcohol' as a party favor. Don't drink anything at all the rest of the year.
You have a favorite drink, a regular bar, a liquor store that knows you - you are probably one of the ten percent. Believe it or not, most of us don't go to a bar most months of the year.
There the majority (18 and over, and slightly under 50% of 12 and over) report consumption in the last month.
Of those, a bit under 7% report "heavy usage". You can look up the definitions, but doesn't include e.g. "usually has a beer or two with dinner".
The category you describe definitely exists, but I don't think it's anywhere close to a majority, and there are also at least a couple reasonable categories between that problematic or abusive consumption.
So if you have a relationship with alcohol it is most likely a healthy one, and it's "addiction all the way down" for... a minority.