I don't think having a glass of wine at lunch or dinner can damage your health; in fact I recall reading somewhere that it's actually healthy. The problems start when you go over that.
Most people will pour a much to large portion, if told to put a glass of wine.
There are some studies that show small cardiovascular benefits for men, they are not counting the overall mortality. Alcohol industry has very effectively propagated these studies into news. Metastudies don't show any health benefits.
I'm sure Jamon Iberico Bellota is also bad for me in various ways, but it's also possibly one of the most delicious foods in the world, so I'll take whatever minor detrimental effects it may have.
Once that was taken into account moderate wine consumption also showed a health impact