The whole JRPG genre is based on a misunderstanding. Early computer 'role-playing' games simply took the numbers and statistics of tabletop role-playing games and made them the focal point of the game because at the time the technology wasn't there to provide a real role-playing experience. These early computer games made their way to Japan before the tabletop RPGs did, so early JRPG developers erroneously thought that the numbers and statistics were what role-playing games were about. Unfortunately that means that while WRPGs or CRPGs use games with actual role-playing as their basis and are evolving to have more and more role-playing, JRPGs use games with virtually no role-playing as their basis and are evolving to have less and less role-playing, and this has led to confusion about exactly what role-playing is.
Role-playing isn't simply taking a pre-made character and playing out a pre-made story, it is creating a character, making decisions for the character, and having an effect on the story. I'm not saying WRPGs provide this type of gameplay yet, but that is what they are moving towards.