neopronouns are pronouns that aren't typically used - essentially any pronoun outside of he/him, she/her, and they/them. a lot of people use them, for reasons varying from queerness to 'their native language uses 'it' as the usual pronoun' to just liking the way it sounds.
having several options presented as selectable buttons rather than just having he/him, she/her, and then 'fill in your own' is also a signifier that the creator respects these pronouns without treating them like an afterthought. this is the first game i've seen with more pronouns than the usual, and it made me happy that people who use different pronouns who play this game will be able to have themselves be referred to the way they want to be referred to rather than fit themselves into a box that doesn't quite fit.
essentially, you personally not needing an option doesn't make those options unnecessary or disruptive, in the same way that you personally may not need curb ramps to get on and off the sidewalk but other people do.