Oh wow. Just wow. "Social engineering". I'm a bit unsure why you mention that 5% of the population non- heterosexual? Are you trying to imply that non heterosexual characters in video games or the Horizon franchise exceed 5%? Because they don't.
I would be interested in doing the math on that, but at the rate we're going, half the new IP between last gen, this gen and next will be full to the brim with non cis-hetero whatever the hell characters.
What I'm saying with that percentage is that even if we're talking about the entire world, and not the core audience of games, that "community" so called is the vast minority, and what they do is not what most people outside of it are interested in seeing. Some more vehemently than others, and some take it too far. But the point still stands.
Whether it makes sense in the context of the world? That's not at all how sexuality and attraction works. Saying that “Aloy should be focused on her job” is not a valid criticism. She's a person, not a machine that is only designed for one task.
That's not how attraction works, but it is how the social norms around it work.
In the context of Horizon's world, populated by traditionalistic and religious tribes built on the back of the foundation of continuing the human race, heterosexual relationships that bear children would be heavily incentivized, and people who were not heterosexual would be accepted to extremely varying degrees; but almost none of it would include the type of celebratory praise that is had in the modern west. It would bring internal and external conflict for the given characters.
Edit: It should be noted that the reference to Aloy focusing on the job is not an argument I make now, but an argument others made to justify why Aloy shows not simply no romantic interest, but aloofness towards any of the characters that she calls close friends in the main game. Surely, that should still apply?
Are you aware that Guerrilla Studios is not located in the United States?
Of course, but their parent's HQ is in California (PlayStation that is).