If that would be the case, NTR Games and Mangas wouldn't be as popular as it is now. If you look at the H-Games which are released past Years, a huge Portion of it are NTR Games or offer atleast at some Point optional NTR Stuff. It goes even that far, that Developers advertise an Game with "NTR" Features (or better say optional Routes) while the Devs clearly itself doesn't know NTR itself, when even Cheating and Swinging is tagged as Netorare. So i'd like to have your statistics with a proof that or atleast a good point / valid argument, that "NTR" fans are the Minority. Because of polls? Well, you can correct me if i'm wrong but often these Polls are Patreon Only... so if, like TT, the Game doesn't offer any kind of NTR yet, i don't see why a lot of People who enjoy NTR would support that Game on Patreon and even are interested in Voting for the Game. Some might keep an Eye on it until they released the NTR Stuff and new people attracted to it as well, but to argue that "NTR is a Minority" based on that it's pretty laughable. I would go as far, and even argue NTR might one of the most popular Kinks / Fetishes so far and can compete with Vanilla Fans(again if you look at the popularity).
And also, i sure don't want to sound like an antagonist here, but i really laughed about the comment that most people fanatasize about Purity and loyality... while this whole media is based on beeing kinky as much as it can be. From Harem (which is also far from "purity") up to Incest, up to BDSM, Group Sex, Corruption, NTR and so on... there are compared to the Games which is out in the Wild, very few examples of vanilla Games which could considered as "Pure and Loyale"... atleast if we argue about Porn-Games. Mangas you have more variety and this aspect and find easier such cases.