
Art is never about entertainment. I have no idea how you could think something like art, which is to do with essence of the most vertical and spiritual, has anything to do with something as subjective and mudane as 'entertainment.' The genius of someone like Debussy is not predicated on how well he is subjectively liked.
Schuon said it best when he claimed that modern art is forever lost because it is disconnected from the objective qualities of forms, colours and dispositions of the material used to create such art. It is aimed at the material, to represent the material, instead of looking toward the spiritual, the Divine, the Logos.
Art gives substance to inanity at best, all those nice words and concepts thrown around when talking about it are merely a smokescreen to make it seem headier and important. Art has the ability to elicit emotion which is already enough, imbuing it with mystic virtues is nonsense. One should not give too much value to philosopher's speak, as they're masters in cloud sculpting, abstraction and disconnection being common amongst them.
Your quote is about some guy who sees only the aesthetics of art, therefore completely missing the purpose. Trying to salvage an incomplete view with a nice wrapping of fancy words doesn't cut it. I would've have bought it a couple of years ago when I still gave credit to 'great thinkers', with time passing I started to see them for what they really are : posers in love with their own greatness and eloquency, on a crusade to bring enlightenment to the inferior masses because ... well, gives their ego a boost.
It's quite funny you mention Debussy, as he's been blasted by the guardians of the Holy Grail of Artistic Integrity in his lifetime for not adhering to the ruleset of traditional euphony.
Actually, that 'guy' saw anything but the aesthetics of art, but hey, pretty guess.
So basically I claim that art has a higher meaning than simple emotions and you counter it by saying:
-too many nice words
-art cannot rise above simply eliciting emotions
-philosophers are full of shit

Okay then, you go on thinking that there is no distinction between styles of art like sculpture, painting and music other than the emotion that elicit and I'll go on thinking that some art is objectively better because it relates itself to something higher than itself rather than to what it is.