I’m sorry but that was so not helpful; and I had high hopes. :’-( People with social anxiety are so freaking worried and over-analyzing about whether they’ll come across wrongly no matter what, yet this ‘trick’ includes a note pointing out that the technique needs to be deployed with appropriate warmth and congeniality.… I see, you mean like every single interaction that’s so complex and stressful?
(also, if someone would just say “It’s been so nice talking with you.” and whirl away, I would be absolutely convinced I’ve just bored them to tears, no matter how bright their smile. But, yeah; social anxiety.)