Oh, I totally agree with you! NTS (sharing, swinging, and similar themes) is fantastic.
I can’t understand those who oppose it! This route is optional, so it doesn’t happen in their storyline. Their opposition is really strange and illogical
Anyway, it’s up to the developer, but if they add this route, my fellow NTS fans and I would definitely support them on Patreon.
I hope for the opposite. Let those who want sharing and swinging go play DS and those who don't can play this.
But about the other topics you raised: The opposition to "optional routes" isn't illogical or strange. Many people have made perfectly cogent defenses of why they oppose those types of content all over the site. It is telling, though, that that is one of the only fetishes were an opposition to it is in need of defense. If I was to say I don't like scat, necro, or beast stuff and would like a dev not to "waste time" making such content and instead focus on other types of content... well, no one would bat an eye and they would understand the concept and my position even if they had no issues with those fetishes personally. But oppose swinging, sharing, netorare, and such and you often get insulted and have to "defend your opposition," to it.
I could lay out how these types of content fill development time, how having it makes me miss content if I avoid it, how its simple inclusion alters the characters (the Mc or NPC depending on how it is implemented) at a fundamental level even if not indulged, or how experience has shown that it often bleeds over even when avoided and several games end up focusing more on it and leaving behind the standard fare. I could expound on the fact that those who don't care about it make up the largest group of AVN fans and supporters, the vast majority of people who enjoy it still play games that don't and never will have it, while those who hate such content will never play games with it and are a larger fan base then those who *exclusively* enjoy it; thus financially, not having it is the better course because you get those who don't care, those who hate it, and those who enjoy it but play and pay for games without it, and you are only missing out on a very small group of people who *exclusively* enjoy and/or support it. But I won't spend too much time doing so. Suffice to say that I hope the game stays free of any such content and doesn't become a clone of that other post apocalypse game and instead charts it's own path free of that type of stuff.