I think a story is better when characters r different, realistic & more diverse, not just in appearance, but in personality. Bc sometimes I read a story & every character just sounds like the author. Ik it’s a basic element of a story, but, it’s often forgotten. There’s nothing wrong w pointing that out 
She’s not saying at all, that it’s more important than ethnic diversity, but it is a v important feature of writing, bc for example when someone is picked on, not everyone can come back w a thought thru roast that could’ve taken ages to write. Everyone is different, & often the differences like that between ppl in stories r often forgotten. 
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