Lucia wrote about Fatima because she was told to. The accounts she produced were composed years after 1917, at the direction of her bishop and her superiors, and they are the reason the events have the detailed shape they now have in Catholic devotion rather than remaining a brief and much vaguer local report.
That makes her position an unusual one, and it is worth naming plainly rather than smoothing over. She is at once the principal witness to the apparitions and the principal author of the record of them, writing at a remove of years, under obedience, for readers who had already decided the events mattered. Historians of the devotion treat the memoirs accordingly: as a genuine first-person source, and as a document shaped by when and why it was written.
None of that is a verdict on the apparitions, which this atlas does not offer for Fatima any more than for any other tradition's reported encounters. It is a point about provenance. A reader who knows that the detailed Fatima narrative rests on one survivor's later written testimony is better placed to understand both why the devotion took the form it did and why the historical study of it concentrates so heavily on the memoirs themselves.
Her own status remains formally unsettled. Her two cousins were canonised at Fatima in 2017; Lucia was not among them, and her cause continues.