It is not, until you goes in public dressed like that, then you have to assume to be judged by the people you’re passing by. The fact you’re a skeleton, an average or an obese person doesn’t change anything at all. Wearing kind of improper outfits is expect to leads some disapproval over 90% of the people you will meet. It would be hypocrite to contest that, I’m sure that most of the people bitching about “fatphobia” or else would have had a little “ew” grin at her. In this case it surely might have been cuter to have wore some accurate sized clothes that matches with the morphology. All is just about harmony since there is no such thing as perfection.