True. I just don't see how something that has no user input, one ending no matter what and nothing you do changes anything could POSSIBLY be considered a game. For something to be a game, for me at least, implies you have input into how it goes (or whoever is playing does.) Otherwise almost anything, like watching TV, could be considered a game. Would be strange to consider a KN a game, but not a regular book just because one is on a screen (but so is an e-book.) And also very weird to consider just reading a game, regardless of media type.
Yes, as there are choices.
What about VNs that just provide the illusion of choice? Plenty of games just give you different dialogue options but none have any really meaning. Or games that the only choice you make is a binary"do you want to have sex?"
Iffy. It's pointless to have it if the same thing happens no matter what the choice. But if there is absolutely no choice at all but "go to next" it's certainly not a game.
Never read a Choose Your Own Adventure book? Some books do have choices.
Yes, exactly they're adventure books. Physically a book, with pages, but not strictly speaking a book with a story from an author. Anyway, you still don't have choices in a kinetic novel...
