What's it supposed to achieve?
"As Snowden shrewdly observes, the alcohol guidelines aren’t written for the public, which will simply ignore them..."
Indeed, the public will ignore them, but I can't really buy the idea that it's just to achieve faux moral one-upmanship at bureaucratic and diplomatic junkets either.
As the article points out, this advice/recommendation runs counter to all of the evidence thus far gained and as such is a contradiction of reality.
The most worrying aspect of this announcement is not that drinking is dangerous at any level but that the government's chief medical advisor thinks it's a good idea to make this announcement, in contradiction of reality, according to all the available evidence, and will achieve some objective by doing so.
Given that the announcement is targeted at the public, and in a pretty high-profile way, as it's in all of the national media, I can't accept that the objective is simply bragging rights at junkets.
I suspect that the real purpose of this announcement is to justify a big rise in booze prices, via a reduction in quantity for the same price, along the same lines as we've seen with recommendations to reduce sugar content and the size of food servings for health reasons, but with no corresponding price cut. Now these measures may deter those who do over-consume, but I doubt it; those who do over-consume already know they are doing so, and will continue to do so, as long as they can afford to. No, I think it's really for everyone else, who doesn't over-consume, and will just have to pay more to get the same (reasonable) amount.