In my career I met more than one BA cabin crew member with an alcohol problem. Equally I met more than one BA pilot with an alcohol problem.
I have no doubt there are others in other airlines.
I hope I speak for the majority when I say that a true alcoholic needs support and a degree of sympathy not outright condemnation.
I do not, of course, find it acceptable if someone attempts to fly either as CC or as a pilot while under the influence.