Drinking is best done alone. I think your argument does not hold.

Seen many dive bar regulars 40s to 60s, seeking relief from reality 4 nights a week. Drinking is how they coalesce a social life, but it's created with other problem drinkers. Their drama, commiserating and complaints were really depressing.

It might be that more educated (wealthy) people self-select into red wine consumption because (1) wealthier people are more likely to have read somewhere that it's healthier (even if it's untrue) and (2) it's more culturally sophisticated, more likely to be drunk over a fancy expensive dinner for example

The craft beer trend might not be old enough to show up in data. Drinking wine might, as far as existing data from several past decades goes, still be statistically connected to higher socioeconomic status.