Douchebaggery over wine in any capacity. It's all a grift. The lot of it. And the mythos, culture, media, personalities, and everything else is just to sustain it.
Wine, up until the mid 20th century, basically went like so: you'd have an estate which had produced wine anything from a few decades, to a few hundred years. It was literally just wine made on some wealthy guy's property, bottled in the thousands, crated, and stored in the basement of his mansion(s.) Close friends, fellow aristocrats, visiting important people or 'celebrities' would have the privilege of drinking it, buying it, or otherwise taking it away.
I'm not going to explain the concept of terroir, that can easily be looked up. Tl;Dr, all wine is different due to 'conditions,' anything ranging from soil PH to the type of stones dotted about the vine clusters, hill position, grape variety, etc.
Dickheads in the mid 1900s realised a huge cash cow was being missed out on. 'Artistry' penetrated the winemaking trade, as it did many others, and an entire culinary culture sprang up around it, along with huge amounts of invention. A comparable phenomenon occurred with tobacco/smoking.
My point ultimately is, anyone who wishes to engage in wine sperging at a dinner party, social event, or anywhere else, is a fraud committing fart sniffer at best, parvenu and retarded cretin at worst.
Don't let ANYONE tell you that wine poncery isn't anything but pure bullshit.