GP doesn't need to, as they said sommelier exams examine on blind tasting. To a level of detail far greater than I could tell you about (though that's largely t

GP doesn't need to, as they said sommelier exams examine on blind tasting. To a level of detail far greater than I could tell you about (though that's largely training I suppose). If someone can't tell that's fine, they can buy whatever they want, but some people can. (And I don't think many people just start buying expensive wine without ever trying cheaper, surely most start quite cheap, develop a taste for it, and work up to some subjective level of diminishing returns and not wanting to pay more.)