It is only a stretch to those who know so little of her life and of the documented testimonies of several contemporaries, friend and foe alike, even of the King of France. It is not only what she "heard" but what she accomplished as a 17 year old maiden commanding the French armies, and how she managed to do it. The court records of her two trials are vast and stunning (imo).
Mark Twain, the iconoclast and no friend of formal Christianity, was so fascinated by her that he spent 12 years researching everything written about her and beyond, much of it in France. His book on Joan of Arc was dismissed by secular critics for dubious reasons, but still remained his personal favorite. Here is an excerpt from an article concerning the subject -----
What Atheists Don't Want You To know About Mark Twain's Secret "I like Joan of Arc best of all my books; and it is the best; I know it perfectly well. And besides, it furnished me seven times the pleasure afforded me by any of the others; twelve years of preparation, and two years of writing. The others needed no preparation and got none."
...Mark Twain admired, maybe even venerated "Joan of Arc" and he was transfixed by the amazing spiritual events experienced by the young French virgin who called herself "Joan the Maid." Writing in a 1904 Harper’s essay, he referred to her as “by far the most extraordinary person the human race has ever produced.”
I hold no misconceptions of convincing you of anything. Just offering an anecdote for what it's worth.