That's funny, I'm actually working on an interactive, choose-your-own adventure app (utilising GPT) right now. Of course, if you just try to do it out of the box, it'll give you a lot of bad results, but there's a lot of tools you can use to improve it and guide it in desired direction. However, the problems I encounter are all on the narrative level (too much of circling back, not following required story beats, etc). The writing is perfectly adequate (in the least) and I don't see how it could possibly ruin children's reading skills.