I agree with you, they should really improve on that front. Also, they do seem to have an international audience in mind (at least at this point), since they tried to be more culturally accurate in Dawntrail.

It's not much but if you look at the winning entries from the 2023 hair style contest there are two to three styles that might go into that direction ("Natural Curls", "Gold & Locs" and perhaps "The Elegant Twist").
https://na.finalfantasyxiv.com/lodes...686c364efc07a2

As far as I understand, all winning entries will be implemented in the game so those hair styles should come in the future. The question is just how long it'll take.