And there's nothing wrong with that! I'm actually unsure as to whether or not I'll be putting a trans option in my own WIP as of this moment.
However, my point was more about the fact that MC's reaction more or less asserted that they cannot be trans and/or intersex (or gender non conforming/ambiguous, for that matter), not that there isn't a more inclusive gender choice. One doesn't need to explicitly write a trans option for the possibility of a trans MC to exist, they only need to assure that they are not outright denying said possibility.
You seem to have misunderstood. I was mostly commenting on the fact that it's highly questionable to think that several countries suddenly having access to new, more deadly technology wouldn't lead to extreme negative consequences. Similar to the idea of a military force having access to nuclear weaponry--it's only ever a pleasant thought if you happen to live in a country that has this power behind it (and often not even then).
And it's more than likely that deadly weapons will eventually end up in the hands of those with ill intentions, whoever one believes that to be. I'm simply skeptical of the idea that few people would be concerned about this. After all, there are already people who protest the hell out of war, and plenty of them would do no less than attempt to overthrow their own government at the idea of using autonomous killing machines against civilians. Not to mention there's the question of what happens when governments decide to use these against their own people.
Simply put, I'd expect there would be a decent number of survivors that ended up living because of their concern about governments killing everyone/taking over with new deadly weaponry in addition to folks who got bad vibes from the idea of autonomous machines.
But I do want to clarify that my response here is just me trying to elaborate because I feel my points weren't fully understood--I'm not trying to argue or anything. Because ultimately, it doesn't really matter much what I, specifically, would like to see. I'm one reader, one voice, of many. And it's your story! If you don't feel that rewriting or adding certain things will improve upon it, then it's likely that they won't. Writing something one doesn't want to write usually doesn't yield good results