My wild theory is that wine can only be grown by those close to civilization, or those with enough riches and landspace to support what would be an only mildly valuable crop (grapes, natch) on its own. Hence, an aristocratic habit which is then admired by the bourgeoisie.
Nowadays it seems that skill in identifying wines is a mark of sophistication, as well as being a wine grower. It seems to be relegated to an older and perhaps more “distinguished” demographic.
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