How come male peacocks have beautiful feathers, but not female peahens?

How come in the Animal Kingdom it’s the male peacock who has the more visually attractive traits, but for humans, it’s the women? And it’s not just peacocks, but male mallard ducks and male birds-of-paradise (see: Dancing with the Birds). Outside of the bird species, male mammals are arguably more visually stunning, such as lions with their proud manes and bucks with…