Gamers by and large have no idea how video games are made and rarely are they curious to learn. This is one of the classic misconceptions: that there is a finite amount of a perfectly malleable resource (time, money, effort) that goes into creating a video game, and therefore the lack of any feature that you feel is missing from the game can be directly attributed to the presence of any other feature you feel is extraneous. In this case, pronouns are just one of many character creation options in an RPG -- the game genre that is all about the player creating and playing as a unique a character. It's a feature that's easier to implement than, say, even one more face customization option, and not meaningfully different in implementation from the classic "are you a boy or a girl?" option.

But development resource management's not really what you're complaining about, is it? You mentioned something there about "small demographics." Your point, your actual point, was about people whom you despise receiving any validation from a hobby that you believe should exist for you and only you.