It seems a sort of inverted snobbery to reject art because of the artist's background
Taken to its logical conclusion, we'd on't have Robert Tressel to read and TS Lowry to look at - both fairly high on my personal list but hardly enough to fill your needs
Shakespeare was the son of a glove-maker who pretty well made it to the top internationally in the theatre world - considering the times and the prevailing political oppression, that's something to shout from the rooftops, not to snide at

INTERESTING ANALYSIS HERE
Jim