In some cases yeah, haha. I've recently found a set that's pretty predictable in the major plot points but it's got a nice amount of guess work for the reader since the main character knows little-nothing about the situation as well. So, we learn alongside him as it plays out.
It's even better...
Maybe because it's a way for writers to get out their itching to create worlds and characters even when they can't write it on their own? I know that's how it is for me because I adore writing and making new universes and constructs to explore but I can never do it on my own because I lose...