Generally because the wokeness of a few things like that is used as a stick to beat reviewers with, tarring all their valid complaints as racism.

See star wars where when people like a character with a black actor (Finn) it's ignored but when people dislike a character with a Korean actor (Rose) the studio/media line is that people are racist and hate asians.

If these adaptations were better their PR staff wouldn't need to blow up a few comments about race swapping by being the only thing they acknowledge, all to justify deleting the "racist criticisms" which they say are all that is plaguing their score. This is the tip of the criticism iceberg but it's all they're willing to engage with.