I'm not a politically correct person, or the type of person that needs everyone to look like me for me to be able to relate to them. I'd be in trouble if I did.
I understand your frustration with the argument being taken too far. But just because you are self-aware about what honest culture looks like doesn't mean that many people in the business of creating comics (or tv/movies/books/etc) are. Representation can be handled bluntly or it can be handled honestly. I'll point to the TV show The Flash, because it does something that I think is rather nice; it has a homosexual police chief character without ever having its other characters react awkwardly to the fact that the police chief is gay. It's just simply who he is; he's a guy, who is married to another guy and has anniversaries and normal problems. His being different isn't used as a source of comedy. It's neither beaten into the audience's heads, nor is it swept under the rug. It's just as normal of a part of the story as the fact that a black cop took in and raised his neighbors' white orphan son when his family died. The Flash isn't blunt about representation or diversity. It's just honest to its story and its world. All stories have totally different needs in that way, but I think that these are good things to think about.
Sorry for sidestepping onto the parallel tracks here. You're right, of course. Representation becomes much broader topic. I'll hop back. I think it's a really good idea to remember that someone's attractiveness doesn't only have to do with their physical appearance, but also their psychology and culture and wealth! The same character could be portrayed as more/less attractive depending on what their natural disposition is (suave? Cool? Happy? Angry/isolated?) ... or wealth (rich characters tend to have nicer clothes, makeup, hair, the things that typical suggest conventional attractiveness to many) ... or goals (characters who try to be conventionally attractive generally are seen that way more often than character who are obsessed with other goals and don't pay much attention to their appearance, etc).
Just as I like stories with characters that don't all look the same, I also like stories where the characters all live in different headspaces, and a character's psychology/sociology can have as big of an impact on how they look as their natural physical features. Think about your typical Cinderella story, or your classic teenage comedy where the nerdy girl gets a makeover and suddenly everyone sees her differently. Those less direct influences on appearance are good things to consider when designing a character, too!
When I bump into this, it can be a turn off depending on how it's handled or whether or not it's weaved into being a part of the story. I don't think it's good to, even unconsciously, perpetuate the message that people who all look the same and value traditional attractiveness are good, and people who don't look conventionally attractive (or merely look different) are bad. That's a really well put, compact way to say what I think I've been trying to say, so thanks for that! :x