I will fan cast however the fuck i want personally i didn’t picture four as mix raced, so i am not going to change my fan cast to please you. it’s a book. So obviously people will interpret things differently, as you are not told the exact skin color a person has or the color of their eyes, or their hair color! It’s a different story completely if you take ATLA for example, katara was brown and they made her white in the movie. But Zuko was white and they used an indian actor to play him in the movie and nobody is mentioning that, they swapped it around.
The difference is you have a clear picture of what they look like, so you’re not picturing them from a description you’ve read. that is whitewashing. i didn’t think Molly was black and i always imagined christina to have a skin tone just a bit darker then kat graham. i will always probably see them that way.