Is wine tasting bullshit?

Take a close look at the screen name, besides the bar tending experience, I have also made wine. I've drank wine in some of those famous regions/vineyards of the world. Actually, at this point I think all of the most famous except France. In my humble opinion... There's a clear difference between a $10 bottle and a quality wine, sometimes... But once it's over $50 up to whatever you can imagine, there is no difference... What do you think?

Funny story, a place I used to work at in New York City, if we didn't have the grape varietal the person I asked for, they were just lie and pour the same color into whatever carafe and tell them they found a bottle. No one ever knew.

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Is wine tasting bullshit?
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