An author is absolutely free to put in or keep out anything they please. An author is permitted to put world before story or do anything else that strikes their fancy.
That author should not be surprised if no agent shows an interest in the complete story, nor complain if beta or other readers are confused or put off by the author's choices.
I am a teacher of medieval history at a university. As such, I'm free to follow my own preferences in what I teach and how I teach it. If I think peasants are smelly and stupid, and I don't want to talk about them, that's my choice. It's my class. I should not, however, be surprised if my teaching is criticized. I should be even less surprised to find that "it's my class" is not regarded as a viable defense of my methodology. Because in fact, my teaching should serve first the subject matter and second the student (I know others would reverse those priorities), and my own tastes come in somewhere around forty-fifth.
Your mileage may vary. But it shouldn't.
That author should not be surprised if no agent shows an interest in the complete story, nor complain if beta or other readers are confused or put off by the author's choices.
I am a teacher of medieval history at a university. As such, I'm free to follow my own preferences in what I teach and how I teach it. If I think peasants are smelly and stupid, and I don't want to talk about them, that's my choice. It's my class. I should not, however, be surprised if my teaching is criticized. I should be even less surprised to find that "it's my class" is not regarded as a viable defense of my methodology. Because in fact, my teaching should serve first the subject matter and second the student (I know others would reverse those priorities), and my own tastes come in somewhere around forty-fifth.
Your mileage may vary. But it shouldn't.