Yea, this is always the thing that gets me about the "lol wine tasting is all lies" crowd. Sure, I'll easily admit that I may not be able to identify and explain the difference between various grapes or such, but that doesn't mean all wine tastes literally exactly the same. I don't necessarily like wine because it's a specific grape, or a specific origin, or more or less expensive, but that doesn't invalidate that I prefer it to some other wine. And an experienced person who has tried a lot of wine, may be able to take my explanation of what I like and recommend me something I'd like more than something else.

It's a bad argument that relies on muddling the objective and the subjective. Yes, in a totally blind tasting, people can be surprised by what they think something is. But if I walk into a wine bar, and tell them I like red wines that are dry and have red fruit flavors, they can likely give me something I'll enjoy. If they tell me that there's a white wine that they think I'll like because of that explanation, then sweet, that sounds cool and different. It doesn't mean that hurr durr all wine is the same.