At no point in history has art ever been scarce on a global scale. The only societies art has EVER even been suppressed in, were dictatorships, where someone specifically had a problem with art and killed people for making it. But even then, there's plenty of art from those places.

Not sure who told you art was scarce at some point, but they're wrong, and you're wrong. Hell we have found art from our non-human ancestors. You're clearly completely out of your element, and talking out of your ass here. You'd be wise to quit digging.