art and music do require skill, and people will pay for good art/music no matter the availability.
take pop music (of all sorts) for example. the money that pours into it is puzzling if you consider the music on its own merits. the melodies are catchy and the lyrics too, but no one really considers it high art. any barroom crooner could sing and play it.
(in fact singing is probably the most accessible and widely distributed art form. we're all born with the instrument and a little practice is all that's needed for passable entertainment.)
so why do pop stars make so much money? it's simply not scarcity that drives the price. it's fashion, or culture, or whatever you prefer to call it. it's the need to forget our troubles. it's our secret hopes and dreams routed through a channel for bonding with our fellow man. that's what we're paying for.
and we'll likely always pay for it. but whether the marketing machine of yesteryear can continue to maintain a stranglehold on access and taste is really the open question.