Yes, the peace award is quite often political .
But you would hope for better for an art prize, with judging made on the art rather than the national origin of the artist.
Actually , one of the best literary books I have read in awhile was a short story collection called
The Royal Ghosts written by a man from Nepal now living in the US. The stories were all set in Nepal, and all were hauntingly beautiful and sad.
I would like to see the award sometimes go to writers like him - people not well known, but producing wonderful and beautiful work that helps people from other countries understand his/her homeland.