The problem is that casting is explicitly not colorblind. Nobody would complain if a Nigerian studio did a black-only version of LotR because (presumably) they have more black actors than white.

It's the intentional woke fuckery, just so the studio can talk about racist manbabies or whatever, that is toxic. They're trying to start this very review-brigading as an excuse for however bad the show turns out. If it tanks they blame the ratings, not the material.