The point is you think about it -- as you are -- and know the relevance of it in your own work. Of course it has a place -- it happens all over the world -- it is what you do with it and why. In the instance cited ( either here or the grimdark thread, i an losing track) in Prince of Thorns, where it us a throwaway mention,that tells us as much about Jorg as anything ( and this is a first person book, we are supposed to know Jorg's pov, not platitudes.) that it turned me off as a reader is irrelevant -- as Mark commented, he isn't going to take my views on it into account, nor should he, my demograph is very, very removed -- he did it ( I think) to show Jorg's dissociation with what is "normal". That i find it against what i want,morally, means nought (except i feel behoven to say I don't like it).
So, sure, it's a trope -- i use it -- but it should be thought about. Like anything we write. And, judging by your posts, you will.