What do you think about the "changing this character race would be bad and racist because their race is important to the story/character but changing this other character race is good and not racist because their race is not important to the story/character" argument?

I recently came across a post on a different sub in which people where talking about the aragorn race swapping in the Magic game. people were calling it out and brought up a white black panther as a example of how that's shit and that the people defending the swapping were hypocrites. then the defenders said that being black is a important part of who the black panther is and that changing it would affect the story but not so with aragorn. this lead to a larger discussion about when characters race are important, about tolkien and racism, about progressive politics/ideology and stuff like that.

have you guys seen these discussions/arguments before? do you think it's valid or bs?