Unlike the others, I completely agree. Art that does not "express, explore, or otherwise stimulate the human mind"[1] is the definition of boring.

I would however claim that the vast majority of art does stimulate the mind, though it may not stimulate yours without some additional effort. Indeed just about anything in the world is capable of stimulating your mind if you look closely enough at it, to paraphrase John Cage.

[1] ... or, if we take a 'vibrant matter' / 'object oriented ontology' view of the world, stimulate something.