I can imagine how hard it can be to hear info like this. I imagine you are a low-carb dieter? If so, you'll get lots of info from well-meaning people about nutrition, primarily based on the science that is out there. Now, I'm not about to discuss the merits/demerits of any diet system, but just keep in mind that low-carb diets are, well, controversial in the nutritional world.
And as for wine -- there are benefits to wine, but not a whole lot of nutritional value to it. You can't nourish your body on alcohol. There are anti-oxidants that are beneficial, but not nourishing. Wine has lots of calories, but not much else--
Compare this to, say, lentils:
But that doesn't mean you can't have wine and enjoy it!