Let’s see. I didn’t read everything that was said before (since it would take a while), but my opinion is this:
I don’t think H-scenes are necessary, but I do think that they can satisfy some people. As such, I have nothing against them, but I think they should make them optional and, by default, put it on Non-H and require a code or something to activate the scenes.
Here’s why:
I think what keeps the VN market from flourishing more is the fact that they are mostly directed towards adults. In all honesty, the first VN I played was one with H-scenes and it was why I played it. However, it still was closer to curiosity than interest. As such, there are plenty of VN that doesn’t feel right with H-scenes. While playing VNs, I came across very few that actually gave the choice of activating H-scenes and they were usually enabled by default. These occurrences were Ef - A Tale of the Two and Kamodori Alchemy Meister (if you consider it a VN). Ef did an exceptional work for many things, including the forced choice of enabling or disabling with no default option.
However, I think that, if the H-scenes were locked by a password of some sort, some VNs could certainly be offered to read to 10+ y.o. people. Granted, some are still too complicated for young people, but I read Rewrite at 12 year old and I had no problem with it, yet I am not even a native English speaker.
So, I think that, the best way to go is not directly in the VNs themselves, but more in the market.
On another note, I am the kind of person who is only attracted to H-scenes containing characters that I have some sort of connection with. In Rewrite, that would either be Akane or Kagari, Shizuru being one that feels too precious anyway. I was excited, but also disappointed when I learned that Eri Kitamura was doing the voice acting for Akane… After all, Eri Kitamura never does H-scenes, but she’s awesome… Kana Hanazawa is also awesome.