I mean, the absurdity of your argument that a sci-fi space rpg can’t meet your standards of “reality” because of a mere ignorable, pre-existing and commonly used pronoun aside, I’m going to have to step in on this particularly low-hanging morsel…
The rules of English grammar are objective.
If English grammatical rules were objective, we’d all still be talking the way people did way before Shakespeare. Actually, Shakespeare’s writings wouldn’t exist today if English grammar wasn’t at all subjective because he flat out made up a ton of words and phrases we still use today. Also, you’ve heard of poetry, right?
“It is a tale told by an idiot, full of sound and fury, signifying nothing.” (Macbeth, Act 5, Scene 5)