
These are probably the same people that complained about Agamemnon’s armor so I’m gonna say the same thing I said to the people that bitched about “historical accuracy” in the live action How To Train Your Dragon: it’s a movie with fantastical creatures who cares that the humans are slightly inaccurate?
The same reason I’m not mad at the cast of Death of Stalin for being a bunch of Brits. A Western European can easily pass for being a Mediterranean European. Race-swapping characters is bad. Doesn’t matter if it’s a historical person or fictional, doesn’t matter if it’s white to black, black to white, etc. If you consciously choose to adapt a story, the bare minimum you should strive for is some semblance of faithfulness unless you’re consciously doing a spin on said story.
This is why something like The Wiz is okay; the characters are all black because it’s not supposed to be an adaptation of the book ‘the Wizard of Oz’, but rather a conscious play on the pre-existing story recontextualized to reflect the African-American experience in the 1970s. Here’s a better question; WHY is Helen of Sparta black? What conscious, narrative driven decision was made for that change? There probably isn’t one. It probably won’t even be addressed.