I feel like what you're failing to understand here is that allowing players the choice to make their character any gender rather than just male or female isn't necessarily 'making a stand' or 'pushing an agenda', what the game currently does however is. The game as it currently is actively limits player to choosing one of two genders. That sends a message, it pushes an agenda, whatever you want to call it. This isn't a choice between making a stand or not getting involved, it's a choice between perpetuating the prevalent and harmful view that there are only two genders (which is objectively untrue and socially problematic for those who identify as neither) or taking action to prevent yourself from doing so. Inaction on the part of the devs isn't them not pushing an agenda, it's just them pushing an agenda which is already prevalent enough that noone notices it. Also, regardless of what video games are 'for', any creator of media has a responsibility to their audience. Whether they choose to examine the implicit messages their choices send or not, the message is still there and still has an effect, and it's their responsibility to acknowledge that. I also disagree that gender nonbinary characters add nothing to gameplay, their inclusion allows for a more compelling and complex narrative with a wider variety of characters. It allows us to experience this world from a different perspective, that's certainly not nothing.