But there is one social situation where people really don't seem to object to being fed unoriginal, mass-marketed communication, even in very vulnerable circumstances.
I'm referring to the exchange of greeting cards.
When you lose a loved one and receive a sympathy card, or when you're going through a tough time and receive a "thinking of you" card, it doesn't really matter that the card giver is using someone else's flowery language because they couldn't think of the right words themselves.
In fact, there's an implied humility involved: "I'm not so good with words, but you deserve good words, so I obtained them from a professional wordsmith at Hallmark."
Perhaps down the line, social expectations will change in a way that acknowledges that people might turn to LLMs to put into words things they would like to say, but fear they cannot say well enough.