I think that there is also the perceived friendliness that goes both ways.
+The author seeing audience helps in giving feedback. It is easy to leave out hard steps when you do not have to see the blank faces.
+The audience also benefits by increased communication through non-verbals signals. Such as cues in what parts are extremely important and the like.
You don't grieve because of what you said. You grieve because you miss them and you don't know when you will see them. I know it is selfish but its true. I attended a funeral once where the son of the deceased was a friend and "We are sad not because we would no longer see him, but because we do not know when.", Of course he maybe lying but sometimes we can take these people's statements at face value. Some people are short sighted, they are saddened inspite of their belief that they would be reunited and what they term the other side/life would be a far far better place. They are saddened because their lives have to change , maybe not for the better.
Your reply made me connect this with "The Usual Suspects".
I think this is very important we have a lot of people who are unsure and don't vote, this I think is a relevant information that must be taken account of.
because preferences are malleable because the people who have them are. For me most moves toward rationality is a drastic perspective change. If you fear to change your preferences the slower you go anywhere great.