According to Osho, awakened people avoid autobiographies because all such stories are ego-biographies; after self-knowledge the 'person' dissolves, dates and events feel dreamlike and meaningless, and the essential truth is ineffable. What can be written trivializes it; what matters cannot be said. Hence masters point to the path through living teaching, not personal narratives.
When you truly know yourself, the 'me' story fades and words can’t hold it, so there’s nothing real to write.