What's morality got to do with art anway?

A month or so ago, after the Grammies, I heard a lot of talk about how giving Amy Winehouse an award only legitimized her drug use. Really? I wonder how true that is, and more importantly, if it is true, does it matter? Does our appreciation of a work of art have to be contingent on the moral rectitude of the creator? I say no. And not because artists are some how exempt from a culture's moral code, and neither because it is an impossibly high standard to keep up for too long. I do think that the aesthetic value or the deep meanings inherent to art constitute an entirely different cultural entity from the artist who has created the work. I am not asking that the artist not be judged for his or her moral and ethical failings; what I am saying is that the work of art itself ought not to be indicted for the sole reason of its creator's flaws.
Take the infamous Wagner, for instance. A member of the Nazi party, a man committed to the Aryan cause and the the genocide that it entailed, Wagner is perhaps the poster-child of this debate. But how much ever I abhor the man, his actions, and what he stood for, I cannot and will not say that his music does not move me. I will admit that not having personally experienced the holocaust and never having known anyone who has, my reaction to Wagner, while very strong, is not visceral. His music does not immediately bring to mind concentration camps; it brings to mind Valkyries and Saxons! But having said that, I do not feel that knowing his past, I must be compelled to condemn his music along with him.
When we create works of art, we bring into the world what is in some measure, the best in us...what is most human in us. And having created art, it is no longer merely of us but of the world. When we create a work of immense beauty, or something that speaks to a certain truth that dwells within humanity, we unwittingly create a being that reflects what we perhaps could have been. Surely, art is bigger than we are, more sublime, and more human than we are? Should it not be judged as such?