I think what they meant was that if you miss or forget some piece of information about what the next step in some arc is there's no way in game to figure it out. There's no quest log, you can't ask someone like Belle what you were supposed to be doing or anything like that.You don't have permission to view the spoiler content. Log in or register now.
Which is why so many people constantly ask after the guide, because the game is unplayable without it for people who don't pay a lot of attention to conversations or who are forgetful about those kind of details.