Ahh, this one >>8051758
It's only in those more "serious" art styles, that are inspired by Western culture to begin with.
Just look at this shithttps://tvtropes.org/pmwiki/pmwiki.php/Characters/Monster>>8052105>Much selective breeding of humanity has happened since then leading to the increased intelligence we display today.
A bit, but humanity is going into the exactly opposite way. Bigger chances of survival equal to more people, which means that a lot of people can fuck with a lot of people.
We could argue that with this phenomena everybody has an increased pool to chose from a perfect partner, which wouldn't be false.