Maybe you're in the minority, and maybe you're not. We don't really know where the majority falls on that question, though we can probably take some educated guesses.
You can take a guess looking at the "likes" on the post I used to share the incest patch, though at least a few (I think even Zorlun made a "like" to it) are people who are not really using it, and just like the idea of having the possibility, and I guess there are people who use the patch without doing a "like" to the post (I still get the notification of new people liking that post).
But not knowing how many people play the game, it is impossible to say if they are more or less than 50%, though my guess would be less than 50%.
The absence of incest in the non-patched version of the game is not the real problem for me. While I do enjoy incest fantasy, I have played and will continue to play plenty of games without any incest content. The real problem for me is the censorship.
In reality, it is the same for me, despite being the author of the incest patch.
I also played mostly games without incest, though Myriam was not the first, and it was probably after Myriam (because it works well in it) that I started playing more of them, but still probably not the majority (even because I don't play that many).
It is most probable that if Myriam had never had incest, thus a partially different story with partially different characters "definitions", I would have played it without it, I did not try the game for the incest tag (I don't even remember if it had it, and if I had looked at the tags).
But Zorlun had made it with it inside, and weaved it in the story in a way that was smooth and did not make it "incest just to have it", like there are movies that have sex scene just to have it, but if one activated it was really part of the story.
When it was taken away for Patreon's censorship, it seemed wrong, and did my patch for myself, then there were all the flames against Zorlun etc., so I decided there was clearly interest and sharing it could put down the flames and make it available.