Funny thing the Wonder Woman Newspaper comics actually fully explain the origin of Etta. Remember Diana talks about how she already knew Etta. Not only that but the Newspaper comic retcon the Nurse Diana story.
Wonder Woman: The Complete Newspaper Strip shows us a more different that Diana didn't have to hide her face or buy her id
I was thinking like we have tribes more focusing on arts or where the doomgate is there is a tribe there more war like than most.