Bg is not a novel and it provides something a novel can't, a direct intervention. I talked about it at length above, but the greatest thing about this kinds of game to me is the option to make choice that will shift the direction of the narrative to accommodate this choice.
A Which-way or Choose-your-own-adventure book does that better. I'm not saying there is no merit to wanting some orchestration in the direction of the story; but placing it above the gameplay is misguided.