I now think Oda does it on purpose
Whether a subliminal message that he somewhat want Zoro to beat only dark skinned or tanned characters
Or
He can only make dark skinned characters as villains , evil dudes that strawhats must beat
Coz there's no way zoro gets to fight almost everytime only such characters in manga and also films
I already don't lie the way he draws those round donut lips which is racist BTW coz it's how racist artists drew black people back in the 1800s-1900s
I like these mangakas but they do dumb stuff like Akira drawing popo.