The quote seems to be cynically alluding to the cliched quest motif and personal transformation tropes that pop culture tends to attach to literary memoirs. There is no formula, simply literary tropes and conventions that an individual uses to enhance the narrative framework of their life story.
The underlying assumption is that a story must possess a narrative, and insofar as a literary memoir is a story, it must present its information within the framework of a narrative. This genre, either sincerely or ironically, puts into practice the maxim that every person is the hero of their story.