Seven years ago, Battle was sacked by the Met for "unprofessional conduct." Her career tanked, and she dropped from view. Now, let us stipulate that she was acting like -- a diva, a prima donna, a horse's ass. She apparently imperiously dismissed an Assistant Manager from the set, for something or other, and that wasn't all of it.
Here is the question: Morally speaking, she deserved to be fired for making the lives of her fellow artists and associated personnel miserable. BUT: The Met exists to produce beautiful music. There is no other excuse for it. A well-run, employee-friendly Opera House putting on mediocre productions with off-key singing and out of tune instrumentalists might well be a worker's paradise, but it would be an utter waste of social resources. Nobody has ever questioned that when Battle opened her mouth, out came sheer beauty.
So, should an exception be made to the norms of decent human behavior for great artists? My socialist genes, inherited from my father's father [apparently not in mitochondrial dna] say NO. But my aesthetic sensibility says, well, maybe.