We must live in very different realities. From my experience in this forum and other places like it, NTR is quite popular. The vocal minority are the NTR haters.
Which makes sense given that most people are somewhat sane and rational, understanding that they are playing a game or reading a novel. Understanding that it's not real life. No matter how hard you try to roleplay. I mean don't get me wrong I too try to immerse myself in the experience and pretend I'm the MC to an extent, but I don't ever let that bleed out into the real world. No amount of enticing roleplaying is ever gonna make me want to bang my sisters or my mother.
As for my feeling on that type of content? I don't kink shame. As long as we're talking about animation, you do you. I think devs should be sensible enough to make some "dividing content" purely optional. But at the end of the day it's their game, their story. If you don't like where it's going, just gtfo.
