Cannibalism is actually a great example of cultural relativism w/ regard to ethics, for example people in other cultures might eat their dead and we instead fill them with toxic preservatives and bury them in the ground, which isn't ethically any better (and arguably worse.) Cannibalism is a great subject for the film because it's such a visceral taboo that you can't help but react, but I think the movie doesn't "romanticize" or "normalize" it, and I don't know if it really could given the context we live in
