If earth encountered a snobby alien race that looked down on us for being barbarians, and appreciated only fine art, would the entire planet immediately start pretending they are sophisticated?
No, lol I think the lemming saying we would try to nuke them is spot on but jokes aside most people wouldn't give a rats arse about these new aliens and only a very small minority would try to create art that appeals to their tastes- just to see if they can cater to their standards.
Hehehehe selling art is very hard already, you want to do so to a race of snobbish aliens? I mean 100% with you that's what they will attempt, but I have my doubts on profitability
Based on our human history of snob thinking they're better and then enslave those they think are barbarian, yes, but not before they enslave most of us and then spare some.
No, we would instead make interspecies pornography of humans boning the aliens and further diminish our status in their eyes. Dommy mommies scoffing at the entire planet. It would be a diplomatic catastrophe.