"I believe that... myth is more potent than history... That hope always triumphs over experience"

I'm really curious as to the origins of the story skeletons like the Tragic Hero and the Hero's Journey. It's obvious that these base story lines are present in almost all of fiction, but it seems curious that storylines such as the Hero's Journey and the Tragic Hero are the ones that form. The Hero's Journey consists of being called to action, a road if trials and tests, a pit or deepest cave, and a return to the world. The Tragic Hero starts at a place of high status and as a result of some terrible character fault, falls to suffering, never to return. They are both very specific - and very peculiar - story lines that seem to permeate all of myth. The question though, is why those stories? Why are they the ones that people keep gravitating to, listening to, eating up and retelling?
My own answer to that is as follows. For the Hero's Journey, it's all about the identification with glory. The Hero's Journey is amazing, and everyone wants to live the life and journey and glory of the hero, so the Hero must start out as some ordinary person, called to act by some extraordinary force (a possibility open to all). They travel down the roads of trials, victory after victory to finally arrive at the centermost cave, the ultimate trial. We all love the story of the last-minute victory, the comeback, the underdog. So the Hero must embody all of those things at once and return to the world no longer the average joe we all associated with, now someone extraordinary, something everyone else wants to be too. Everyone out there could possibly be this hero, it could be any of us. That's why we love those stories, we believe in our minds that we ourselves could be that same person. The Tragic Hero is basically the educational what-not-to-do-now story that comes after the Hero's Journey. The Tragic Hero starts at the place of status attained by a Hero. We all love to see how others make the mistakes we know we could never make, and in a fashion opposite of the Hero's Journey, we automatically don't associate ourselves with the Tragic Hero. We see ourselves as the version of the Tragic Hero that attains the initial success of him but we don't lose it. We immediately gravitate towards stories we want to be ours, without the possibility of the story ending badly. They are all of our stories, to ourselves, in our imaginations. That is why we, as a society gravitate towards those story arcs.