Unfortunately Hollywood and entertainment in general just aren't original in how they portray things. Rather than trying to break new ground, they'll stick to overused cliches and go with what is firmly engrained into our minds. I think originally it was meant as a way of showing how evil the individual was, that their outward appearance is a reflection of their inner ugliness and scars.
Nowadays it's basically how Sherry described it. Rather than come up with any kind of intuitive backstory to let us learn through his actions that he is evil, Hollywood would rather just slap some scars on him or make him physically unattractive, and boom, instant stereotypical villain.
That's why I feel that, nowadays, it's actually the physically attractive characters that potentially make for the better villain. The ones that hide their inner scars and ugliness behind a suave smile and a pair of pretty eyes capable of leaving the audience in the dark.