I think it's worth pointing out a significant difference here that makes this a bad analogy.
... You have to remember that this is a story that is comprised of many different people passing the stories on to others. You know...like the telephone game.....some of it has to be exaggerated..right?...
The process of passing myth and legend down the generations involves the learning of songs, poems, epics and stories that are listened to by children from the time they are born, and learnt by continuous repetition, often in community recital, over many years. They are thus learnt verbatim, and repeated in concert with members of several generations at the same time.
The telephone game is a game that relies on one person hearing (mishearing?) something once and then passing on what they remember of that message to one other person once, and observing the resultant unavoidable corruption of the original message.
This argument is a bit of a straw man used to downplay the importance of myth and legend in our evolving and current story.