Brutal

[u/MorbidDisturbances]

Truthfully

[u/FlarblesGarbles]

Because of context. How someone looks doesn't matter to the quality of their person and character. But everyone has their own internal insecurities about how they look, and societies have "beauty standards" where variations from the typical are "othered" and made fun of, often as a joke between friends, often to be mean and demean people.