>>23320423
Your question makes no sense. The Hero's journey is just a structure that can be applied to pretty much any tale involving a hero.
It's like asking 'what is often the main topic in a book'

>>23320423
in Campbell's own view it is the confrontation of the unknown. that which forms all the images of gods, devils, and superhuman feats. it's about finding God. Passing all of the trials he has finally found the well at the bottom of knowledge. upon finding it the hero may begin his journey back towards our world with the claim of his first prize, the goddess. For now he is the knower, and she has found a man who knows. now the temptress is no match for him, and he may pass through the sun door a man, forgive or slay his father, and see the eternal spirit of the father or mother within every human. he then has gay sex with a twink.

>>23320423
From experience, it ranges from the idea 'Huh?' to laying on the street at night and having to be ambulanced to the hospital with sirens on.

>>23320526
That's what genre is for.