Celebrity trumps artistry in the world of "fine art". But in popular art - thinking movies in particular here - people may go see a movie because Scorsese directed it, but will still happily give a bad review if they didn't like it.
I guess this is the difference between enjoying art for what it does for you, vs. wanting art for what it says about you for having it.
I guess this is the difference between enjoying art for what it does for you, vs. wanting art for what it says about you for having it.