>Batswana woman who has studied his work as part of her MA thesis in the University of Botswana. She said that there are significant gaps in how he represented the culture

So see. There you go. It was reasonable to think that he had a good understanding of the culture. Now it's reasonable to think that he doesn't. I'd be a little cautious to take a goodsread comment as law, but it's unlikely she'd make up studying it as an MA.