I guess exceptions prove Georges rule, except when they don't.
Matisse used to say he wanted his paintings to feel as comfortable as an easy chair, and nothing soothes the soul as beautifully as a lovely piece of music. Sure there are works of art that are disturbing, but that's not art's main job, and the job of science doesn't, in every case, do much to reassure us. Heard of the atomic bomb?
I'd say both can, and do in many cases, do both.