From the article I posted, which you ignored:

"The team studied the influence of a gene that codes for alcohol
dehydrogenase type 3 (ADH3), which breaks down alcohol. An inherited
difference in this gene yields two forms, one that works faster than the
other. Among the study participants, those who consumed alcohol moderately
had a lower risk of heart disease. However, among the moderate drinkers,
those with the gene that breaks down alcohol more slowly, had higher levels
of good cholesterol (HDL) and a greater reduction in risk for heart disease,
compared to participants with the gene for the faster enzyme"

So then 1) moderate drinkers faired better than non-drinkers and heavy
drinkers, AND 2) among the moderate drinkers, those with this particular
gene variation faired best. This points to a genetic basis for the health
benefits of moderate alcohol consumption. 

It is notable also that the gene associated with the greatest health
benefits enables slower metabolism of alcohol. Among moderate alcohol
consumers, the longer the low level of alcohol lingers in the system, the
greater are the health benefits. 

-gts