I'd wager how expensive it has gotten plus a year or two of lockdowns which lead to a whole generation of people not going out to get wasted as soon as they're legally allowed to had way more effect.

Oh, and weed being increasingly legal to consume.

Real life experience with alcoholics would at-best be constant over time, or be diminishing (since gen Z drinks less).

Also seems like the science on whether science communication actual changes behavior doesn't point towards it being much of a cause here.