I think as an addictive and potentially life destroying substance that promotes bad behavior our culture has a blind spot, or a kind of denial.
However the research suggesting that alcohol also decreases all cause mortality relative to abstinence, even when consumed heavily, seems pretty strong and not influenced by the factors referred to in this article. The link between alcohol intake and lower obesity also defies intuition.
The research is also hampered by the premise that it’s unethical to do a intervention study that has heavy alcohol use as one of the groups.
The whole thing seems like a misuse of research, to me. The effects of alcohol, both positive and negative, are mostly apparent to anyone who looks around.
Edit:spelling