it really hasn't. the art that you see in museums are all examples of ideas and forms that broke the mold.
> When everyone can create art, art has no value
everyone _can_ create art today. art still has value.
> Value is always determined by supply against demand
if you view art as a purely capitalist enterprise. most people don't.
> The brutal reality is art really isn't valuable in the first place (it is after all an unnecessary and inefficient luxury)
art is both an expression and driver of human culture. much of our understanding of our species, our ancestors, and our lives comes from art.