The difference in these scenarios is whether to use diversity as a means to an end, or that diversity naturally fits the expectations held by people of all races, given the nearest period and setting in human history depicted where fantasy is drawing from.

The issue is that it was forced/selected, and the cast members who championed diversity in their interviews made it extremely clear this was the case through their remarks around self-proclaimed activism, which lends itself to the poor reviews.

People are tired of identity politics influencing their entertainment, which they are trying to use to avoid said politics. Naturally, viewers are rubbed the wrong way when a show presents itself as a medium for subtle activism in a time when racial tensions and identity politics are at the forefront because racial differences are being forcefully minimized in favor of a singular prescribed globalist posture, while some groups are being verbally abused and humiliated on public television, late night comedy shows, in our elected offices, and on well-funded talk shows on the regular -- as all of these establishments laugh together while they publicly dehumanize white folks (and brown folks who see through their BS).

This is what we have on our hands, and it's unwelcome.