And for our times we have a banana on the wall and we're not supposed to argue because taste is relative and someone likes that ... as we slow step our way down the staircase to oblivion.
Picasso couldn't have achieved in abstraction if he hadn't been classically trained. And that's easy to verify: take an imitation (of which there are many) and an original. Even someone not well-versed it art can pick out the original.
There are other places to draw parallels from. Runway fashion shows nearly always show bizarre items no sane person would wear to the local grocery store. But they each, individually, make a new statement that draws some sort of reaction from the observers. It's the very essence of art.
Off the catwalk, scenes like Lady Gaga wearing a meat dress to an award program might offend some people, but you can't deny the originality and subsequent reaction. There were certainly people claiming it wasn't fashion or art.
Yet if someone aped it, it would be suddenly boring and passe, and people would totally recognize it as being derivative. And that sure sounds like art.
There is simply too much art being produced in the contemporary art world for your argument to make any sense at all.
And it is not like past was composed of Monets only. Or as if people decorated their houses or their products by old paintings only.
>reviews were filled with accusations of quackery, insanity, immorality, and anarchy, as well as parodies, caricatures, doggerels, and mock exhibitions
110 years ago
Let's take your example of the Armory Show. It took only two or three decades for Duchamp's Nude Descending a Staircase to be recognized for its genius.
Jeff Koons' Pink Panther was almost four decades ago. Anyone feel like a fool yet? The art world has egg on its face and it's not because it's pushing boundaries; it's pushing junk as a front for money laundering and pretending that taste is relative because it likes the money and talentless people like to call themselves artists.