Everyone focuses on the letter and how it's written. Nobody tells the Dear Author to assume good faith and best intention and Optional Details Are Optional.
I think I misunderstood your original post. You're saying something like, writing a Yuletide letter from the point of view of "I want this/don't want that" versus writing a yuletide letter worded as "if you want help creating a story for me."
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Gotcha. :-)