Domesticated animals are more likely to be piebald because we've selected for it, because its beautiful. Why then is there no sexual selection for piebaldism in humans beyond valuing freckles?
Two interesting related guesses! I think the second one is rather weaker than the first: consider for example the American Hairless Terrier and the Piebald Ball Python, both beautiful and neither eliciting disgust.pic.twitter.com/eRbnNG9lke