I don't mean to sound flippant or sarcastic, but I'm not sure I'd look to a psychiatrist to be an expert on the physical (not mental/emotional) effects of alcohol.

Beyond that, this paper does actually seem to shed some light on what is and is not safe. If 0-100 grams of alcohol per week only decreases your life expectancy by 6 months, I'd consider that pretty safe. I mean, I imagine getting behind the wheel of a car to drive to work every day reduces your life expectancy in a way that working from home every day doesn't. And yet people all over the place drive daily, and we consider that plenty safe enough. At least drinking alcohol is a lot more fun.

Absolutely agree with you on the idea that there seems to be a concerted effort in research to find a way, any way, to deem alcohol consumption safe or good for you in some ways.