I see a game very different from a novel, show or movie. A game is just something you play. The novel, show and movie have a story and all.I am.not sure what distinction you are drawing here. Especially since you admitted you don't know about games. What do you think is different between these things?
Like, ok, a game rulebook sits on a table. Someone 1000 miles away writes a fantasy story and sells it. So person number two comes in and puts the name of of the RPG on the cover. So, ok, now this randomly written novel is a "game novel".
I don't get the "lump everything together for no reason" myself.