I remember when I thought olive skin meant black (like olives)

I thought Katniss from The Hunger Games was black 🤣

I honestly think that the authors personal experiences affect their writing. They may not even notice that they are excluding other races.

Maybe they also feel like they can’t write those characters because they feel like they can’t represent them well.

I honestly don’t know why though, a group of real authors would need to let you know…