I just jump into this conversation: drum roll... I'm currently building a non-erotic version of CHYOA. At the same time, this new version will serve as a new code base for CHYOA version 3.0.
I hope this will please one or the other
I kiss this message in non-erotic an VERY erotic ways.
Would it be weird or odd to make a Non-Erotic story? (stories without sexual acts)
It would definitely be odd, although that doesn't mean is a bad thing at all. As others have said, it provably won't be super popular, as there are many people who use this site as a way and means for slightly more refined masturbation, and that is a reality we all authors have to deal with. My own story is not precisely an example of moderation when it comes to sexual content, but I have written a non-erotic/character-driven chapter from time to time (It's a bad habit of mine, I'm working on it), and they are always the ones who receive less likes by far. There is a portion of users who really come here looking for well written stories, but they are a minority.
That said, if you look at the stories that are already in the non-erotic category (ignoring the guides), it's true that none of them are popular, but also none of them are really developed or even moderately active, most of them don't reach the 20 chapters, and let me tell you: unless you write a really clickbaity and mainstream story ala 'Young gamer guy fuck her sister and then the whole school with mental powers and big dick', you will need at least 40 chapters and a few months of semi-constant activity to really built a fan base here. I would actually recommend you not using that category, but posting your story in one of the more generic ones like 'fantasy', 'Sci-fi' or 'romance'. That alone would make you reach more people. Write an statement in the front page saying that you are not interested in the sexual part (don't say you WON'T, just that it is not your priority) Then, if you so wish, you could set the story to moderated and use the chyoa format to your advantage, letting other authors write more erotic alternative routes. That way, the story could have e-content, even if you don't write it yourself.
But if your really, really want a pure and uncorrupted non-erotica story, you have my sincere blessings. Post it here when you do it and I will look at it.
Also, for all you hack writers reading, 'Young gamer guy fuck her sister and then the whole school with mental powers and big dick' is my idea and don't you dare steal it from me!