All I can say is that most popular non-fiction also didn’t happen and is just the pov or idea of the author. (Of course I’m not counting academical works, most of which are based on facts and real studies and observations - thought perhaps not all).

I think what you can do is lay off of children’s/YA lit for a while, at least until you cross this period of taste. Maybe after a while of reading more realistic literature you can go back to enjoying the more fantastic kind of books …