These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: The Ugly Duckling
Hollywood Homely: Baby swans are more or less identical to ducklings except for feather color.
It's probably more a case of "beauty is in the eye of the beholder" since the other ducks still shun the titular ugly "duckling".
Interestingly, in some versions where the old woman briefly takes him in, she comments on his ugliness, as well.