I don't think anyone on the forum has problems about avoidable stuff. It may vary on the fetish style but if it's avoidable, we have no problem. But I don't agree that NTR is unpopular. Last two weeks or so was a bombartment of NTR, you may see a lot of users whining about this stuf...
Me, I don't even slightly like NTR. I basically like RPG and don't like cheating, but it does vary as well. In most games, when you interact with a milf who has a husband, which is most of the time away or something, I don't mind that. The reason is simple, I don't see the husband, I don't feel like there is NTR. But hardcore stuff is just something I don't like and the problem is people are making it unavoidable... Imagine a game you may like; you loved the art, you loved the plot but it has a unavoidable fetish that disgust you. Basically developers can cut out the scenes and some part of the plot to make it at least unavoidable, the problem starts there.
But; peoples' fetishes are different from one another, so if a developer's intentions are for NTR based game, it's compeletly normal and I understand it.