Odd Question About Alcohol

[Siegmund]

Realized I never addressed OP's question at all.

Yes, it's a possible viewpoint for someone to take. Most likely a view of a nondrinker, not surprisingly - its very easy for someone who doesn't like drinking to say "drinking sometimes has negative effects, and has no positive effects, so obviously people should't drink." People who enjoy alcohol will argue it does have positive effects (relaxation, sociability, whatever - even if we accept the effects on decision-making are negative) and may set a higher bar for the point at which the net effect becomes negative.

Wherever you DO set the bar for the point at which the net effect of additional alcohol is negative, it would be logical for you to argue that drinking beyond that point is
immoral, to persons with a particular vaguely utilitarian view of morals anyway.