I think the notion of not treating artists for mental illness is partially a reactionary response from the idea that "normalcy" is valued over creativity. I have had many patients who don't want treatment because they believe that it will kill their artistic drive and their ideas. And I've heard of other psych providers who will over medicate and not listen to patients' requests for med changes when they find their creativity tamped down so severely. But like all things in life, it's about balance. If you're so depressed that you can't even lift a finger, there's no way to express your ideas no matter how brilliant they are. And everyone deserves happiness. The notion of the suffering artist is so disgustingly romanticized. I think it the person who commented on your blog had severe depression or hallucinated horrifying things, they'd be singing a different tune on the matter.