All of which speaks to any number of issues.
1. The desire to humanize Monsters.
2. The lack of making monster races, truly alien and monstrous (40K Orks).
I truly believe the only 'out' if one desired or cared to justify evil humanoids as a default/standard/monolith, is Gods.
If it's not Gods (which again I've come to believe introduce a number of truly setting crippling flaws if deconstructed) then either one is saying the cultural angle is too strong, and you will get into racism territory, or that they do not wish to make it anything deeper than 'here are bad guys' no why/how provided.
Which is fine at an individual level, but not something we can expect Wizards to forward as a default in the year 2021.
Ultimately, I think Gods are kind of an underlying problem to be addressed, and I have to wonder if Wizards has thought on it at all.
Lunch over, back to work!