> What sort of a closed minded attitude is it to say “why would I bother looking into the facts that support a conclusion I am not willing to believe could possibly be true”

It's not about not believing the conclusion itself, my point is that it's absurd to claim there is a meaningful objective sense in which the Mona Lisa is better or worse art than the Oddisey. The question itself is meaningless. Of course you can invent a model which assigns some quantitative art goodness value to pieces of art - your model could say "the more color it has, the better the artwork": perfectly objective, entirely useless.