Why is vodka rarely served in mixology bars and upscale speakeasies?!
Because vodka is, by definition, an odorless, flavorless spirit. Ergo, it adds nothing to a drink other than alcohol.
Vodka has been popular for many years, but not by people who know anything about booze. Grey Goose, for example, is terrible vodka, but it sells because Sydney Frank was a marketing genius.