And obviously every single group in their fantasy world, but especially if they are poc, is a monolith with no variations in culture, behaviour or beliefs based on geographical distances or any other no. of factors.

I personally dislike when a fantasy ancestry is used to represent a specific human culture, and humans are left with no variations (the standard being usually medieval-ish Europe). But what could the alternative be, if we want to have different fantasy ancestries living together, and we want them to be recognizable? Honest question