No, this is stupid. Regional mythology isn't colorblind casting. If you're reading African myths and picturing the characters as non-African, you're doing it wrong.
This is the most prevalent case of "You're doing it wrong." in human history with all the pictures of white European Jesus in homes, churches, and other buildings throughout the world.
Children draw inspiration from reinterpretations of fiction all the time. This is one of the reasons folk tales are read to children. As a teacher, I am showing kids that some ideas exist wherever you go, even if the story explicitly says the character is Mexican or Irish.
I'm not suggesting that Jesus was white. I'm just saying that the Bible has the account of a bunch of goatherds that either existed or they didn't, and if they didn't live, they can be any color the reader likes. This is especially true since the Bible makes only small references to skin color.
I happen to be a person of faith and accept the scientific conclusions of ethnicities in the Bible.
Also, mythology exists to explain the natural world with the supernatural. Its characteristics are not enclosed by race. Usually the people writing it believe their truth is the truth of the entire world.