Characters across all fiction media must overcome the uncanny valley. In film, we call it “suspension of disbelief”. The more conventionally attractive a character is, the easier it becomes to override the audience’s inherent bias against fictional constructs. We don’t enjoy being lied to, and we are more likely to believe attractive people.

What this feminist is really mad about is the existence of objective beauty standards. If her premise is that such standards don’t exist, then she’s denying the research. If her intent is merely to attack the standard, then she’s just a pathological subversive. You can’t deny or fight a hurricane.