Kim and Kanye are accused of having no talent. Part of this is class-based, in that people think they are better than reality stars and rappers, have no respect for what they do and resent their success at doing it. (See also the people threatening to cancel their Vogue subscriptions when they appeared as the mag's first interracial cover couple.)
There should be no mistake, it's more embarrassing for an adult to not know Kanye at this point in time than it is for a teen to not know McCartney. White dominance of cultural norms is the only reason click-bait articles decrying the masses of 50-somethings who don't know who Kanye West is aren't being published.