It would appear that to many people “folk stories” and “superstition” are one and the same thing. This I could understand if the stories were packed with evil forebodings and dark portents but this is far from the case. In folktales it is considerably more common for the protagonist to crash through the action without any suggestion of what is coming. If they do get given a prediction it is more often than not a clear and accurate description of the obstacles that lie ahead, usually along with detailed instructions on how to overcome them.
In Sleeping Beauty the wicked fairy lays a curse on the young princess of death by a finger pricked on a spindle. The good fairy commutes the sentence to 100 years sleep ending with a royal snog. This is exactly what happens. In The King Of England’s Three Sons each son in turn is given the low down on how to break in to a castle: they must cross the black moat on the back of a swan, sneak past the guards and find the golden apples they are seeking in a secret garden. The only supernatural bit being the warning not to look back whilst escaping or the apples will be lost. You will be un-surprised to hear that everything turns out to be just as they are told and we even get the middle prince losing his hard won treasure by looking back. The youngest (of course) observes the instructions fully and carries off the precious fruit. It seems the oral tradition is rather literal when it comes to auguries. No ill-defined Delphic declarations for Jack and his ilk: just follow the tutorial and live happily ever after! Maybe it is the nature of stories shaped in the mouth that they tend towards the optimistic.
So how did this confusion between superstition and folktale come about? Where are all the yarns with mysterious prognostications? What you are thinking of there is literature. Shakespeare’s work is full of creaky crones prophesying unlikely and un-specific doom and destruction, the shadow of which then hangs over the action until they are proved one hundred percent correct. In Julius Caesar he dooms his eponymous lead to die on the famous “Ides of March” and the would-be god duly obliges (with the help of his friends). Despite the apparent improbability of Hamlet’s destiny, he too is carried off in accordance with his heathland Hags’ pronouncements. The Ancient Greek penchant for oracular predetermination is mostly down to the writings of Homer; the various sooths said for King Arthur are updated by each medieval author in turn. Writers just can’t seem to resist an obscure augury as a device for supplying a witty twist whilst trotting inexorably towards predicted tragedy.
The interesting thing is that as a society we publicly, and nowadays officially, consider the foretelling of the future to be nonsense. The pervading wisdom is that no one can know what is going to happen and anyone who claims to is a charlatan. Nevertheless, all our stories of predictions, whether born from a quill or evolved via voices, treat divination as real, accurate and inescapable. If I was a psychologist I would be worried about us, we seem to have something of a personality disorder.