From the start, I want to say that my game will never have NTR. But all the questions about whether I will ever include it in my game made me curious. I understand that someone can dislike that content, but why, of all the kinks that people could dislike, do I only hear about that one? Why is it hated to this degree? I'm sure there are other things that people could hate, so why only worry about NTR? It is not even that common, or at least I have never seen it in many games.
Some people have been cheated on in the past and it brings back uncomfortable feelings, some people cannot disengage from it being a fictional story and CANNOT do anything but self insert as the MC (hence why the same people who decry Netorare I have found have NO PROBLEM with Netori), some people follow the crowd of hating it because it's the cool thing to do, some people assert (and I have seen it as well as the opposite) that NTR lovers are proliferate in constantly asking, throwing money around basically trying to get it in games that don't have it to feel that same level of having something taken away from another, some people cannot fathom the idea that even if they cannot understand something, someone else does and likewise that just because someone doesn't like something it doesn't mean that one should turn their subjective morality into an objective one, or attempt to. People like what they like, I sometimes get something similiar in the Futa genre, some don't understand it. The key point is that it is far better for everyone, and makes a far stronger and developed person if you can realise that sometimes, things are not understandable to some people and never will be, and simply to accept that. I cannot fathom what is sexy about being peed on, or playing with do-do, or people that dress in animal fur suits and call themselves Bigknot Greymane. But in the end I just accept I can't understand it, I accept others find it enjoyable in a way I cannot fathom, and I simply move on. But others have the idea that if I cannot understand it then no-one else should, or they disagree with a genre morally and project their morality onto others with anyone not being like them being labelled degenerate or deviant (without the self reflection to realise someone else probably thinks that of them.), or they attach their own perception and background experiences onto the genre, or a myriad of other reasons.
In the end, it doesn't even matter. Anyone who attacks a genre, because of the genre, needs to self reflect and ask themselves one question: Why? and I mean honestly, a deep self reflection and analysis. But people won't do that, it's far easier to conquer an external enemy, even one created and a projection, than conquer oneself.