Because nose piercings look trashy and attention seeking, considering Tattoos are the bodily equivalent of Graffiti in a run down ghetto, piercings are pretty much the metallic trash cans in front.

Theres a difference between aesthetics and vandalism. Considering the games already solid visual identity after all. You wouldn't paste tacky stickers on a Lamborghini, would you?

It’s the ultimate way to strip these unique fantasy races of their inherent charm and replace it with a generic, low effort modern template.