Remathilis
Legend
I mean, there is a generalized problem with the whole notion of violence in D&D when you boil it down far enough. But that's a different topic that no one wants to discuss.I was about to post something similar before I came across your post.
I understand the urge to treat humanoids differently (these sophonts resemble us too much, and we shouldn't de-personize them), but in a sense that is itself more inherently problematic (i.e. it's ok to de-personize and kill sophonts that don't resemble us too much).
I don't think you can really get away from the fact that it's not ok to kill sophonts.
I guess WotC feels if they made the ex-humanoids monstrous enough, they could keep in their classic game role. If nobody complains about killing a fey hag or fiend bearded devil after all, they won't care as much much about a fey goblin or fiend gnoll. Will that work? IDK. They certainly achieved their goal of both removing monocultures from humanoids and not flooding Waterdeep with kobold bakers, gnoll miners and bugbear mail carriers. It's a compromise that appeases nobody, aka the best kind of compromise.