[Steve_Seattle]

Someone on Fox said he uses the fake set because the layout of the real locations make it difficult for him to use the kind of teleprompting equipment that he heavily relies on to utter a coherent thought.

[Flick Lives]

Someone on Fox said he uses the fake set because the layout of the real locations make it difficult for him to use the kind of teleprompting equipment that he heavily relies on to utter a coherent thought.

—

That sounds plausible