Is your point: “these producers are using diversity as a selling point of their movie when they should be focusing on good story writing that just happens to be good for a diverse cast.”?

Or is it: “the diversity doesn’t make sense in these formats because of X, y, z”?

I’m really not sure your point here. I think a lot of the mentioned and alluded to shows/movies have flopped because they just have poor writing as opposed to the diversity of the cast. I personally don’t care who plays a role as long as they play it well.