Ok, I wouldn't say it's completely retarded but the sentiment has been said a thousand times over and it's only half true. We all know what makes a person conventionally attractive which is why people who are typically less good looking find it harder to find people to date, looks are subjective to an extent but to say that "nobody's ugly" (which is something people genuinely believe in) is just a justification used to pussy foot around ugliness. There's no shame with being ugly, it's obviously something you can't change but it's also pretty stupid to ignore the social effects that come along side it. If we were given the same picture of a girl/guy and they were ugly, we would most likely be able to gauge that they are ugly and give them a similiar rating. Assuming we're both being honest. Generally speaking, we all know what makes a person look good (asides from niches/fetishes/etc).

I apologize if I sounded hostile btw.