Evil gator said:
I don’t really give a shit if it’s fantasy.
I usually don't, either, but it's not consistent with the universe they've already established. People from different parts of the world - just like our world - have different characteristics. Plus, there are established bloodlines in the books and there are a ton of storylines about babies being switched, bastards being born, suspicions that children don't look like their purported father, etc.
Maybe it'll all make sense within the context of the new show's plot, but if they are suddenly making a Valyrian look like someone from Naath or the Summer Islands, they should probably have some kind of in-universe explanation.