(Not trying to be judgy. People just seem to forget about the gender neutral use of "they".)
I found it actually fairly annoying at first, but quickly got over it because it is related to the plot. Same for Sanderson, I've read all his books and am not even sure now which one you're talking about!
Sometimes we need a nudge to notice the unconscious bias around us, and it's often uncomfortable.
Not really: https://www.merriam-webster.com/words-at-play/singular-nonbi...
How is this offensive to anyone??