I see what you mean, but I've been on here long enough to notice that NTR, even as an alternative/toggleable route is sufficient to trigger people on here. Additionally, some people just can't help themselves when it comes to sticking to avoiding it either. And If I'm being real honest, I agree with the people in here who think Bob's scenes ( as few of them as there are , for now) are the best the game has to offer (just by virtue of most of the PC's scenes being pretty mid overall) and from the dev's previews art for future updates, it doesn't seem like that will change. I don't really view the whole toggleable NTR as much reassurance in that regard since players not into it would be avoiding some of the best content from the game.
As for the ratio of NTR scenes to PC scenes, let's just say the dev has confirmed he'll be drawing "many more" NTR scenes in the near future. How that will affect the ratio, I'm not exactly certain, but some players may not be happy with time and resources going towards that, and if that's the case, are probably better suited to focusing on other games.