Joseph, you follow the script very well! 🙂
As an avid reader, I can tell you there are not enough Jewish books out there, and from the ones that are available not all of them are worth reading. Not all of them are worth writing. I think that one must find an author thats kosher and stick to that.
You said no one has to read it, and thats true. But most children/teens dont do chessed 24/7. There are not enough activities out there. So many things are being banned. Its not right to take something away and not provide a replacement. The best (practical) argument that can be said for a kosher book is bittul zman.