I often participate in brown bag tastings, where some of the wines are so obscure there’s pretty much no basis someone could guess them. Still, the comments some people make are very insightful. A few wines I’ve brought have not shown “correct”, so the guesses were off for what they were, but were excellent for how they showed.
Nailing a wine’s vineyard and vintage requires the relevant experience of those parameters. Call that a parlor trick or call it a bought talent. I’m more interested in practical application. A chef tasting a wine, then choosing and fine tuning a perfect pairing. A sommelier tasting a dish and finding the perfect wine to match it. A winemaker using the skill to guide future choices. A winemaker using the skill to help with blending and declassification choices. Etc.