Please excuse my determinist reply to the problem of drunk passengers.
I work in an environment where drunkenness is variably tolerated.
In the Emergency Department of hospitals it is de rigeur that an assessment is made as to whether a person is drunk or displaying symptoms of other illnesses.
In a breast augmentation clinic a drunk client would be removed by police.
It would appear to me that in aviation the airline staff are slaves to on the one hand to the airport corporations, the latter's interests being to intoxicate passengers for profit, and on the other to their employers whose interests lie in bums on seats.
I see no way out of this except a critical incident, or some simple advice to airline staff, to "harden up" and refuse embarkation to the intoxicated.
It is not an easy choice.
Then again breast augmentation is fraught.