I think the argument against moderate drinking, and it is not a particularly strong one, is that is hard to remain moderate, not that moderate drinking per se i

I think the argument against moderate drinking, and it is not a particularly strong one, is that is hard to remain moderate, not that moderate drinking per se is dangerous. I think your grandfather would be deemed a teetotaler by today's standard. "moderate drinking" today is considered having a few glass of wines per week and you need really good discipline not to go from there to less moderate drinking.