I suspect you mean they are succeeding at being sexist?
Also, why is it sexist to acknowledge that some people are better looking than others? Clearly, making this sort of judgment about a non-customer-facing role is inappropriate, but is it wrong to acknowledge that looks play a part in customer contact[1] roles?
[1] In person, obviously. No one care what the call center person looks like as long as they speak English.
More generally, calling things "PC" is a lazy shortcut, a straw man attack.
I mean, unless someone actually sincerely says to you "oh, reinhardt, you mustn't say XYZ, I want you to be politically correct". In that case, mock away.
I absolutely disagree with JulianMorrison (that "us[ing] the concept 'ugly women' is failing so hard at sexism ..."). My disagreement has nothing to do with suspecting him of being "PC", nor do I dismiss other related claims from other people because of the existence of this statement.
But honestly, someone who uses the concept "ugly women" is failing so hard at sexism already they might as well be a character from "Mad Men".