I think it goes against the basic nature of a human to want to go up to a strangers door and talk about a topic that may/may not be controversial or well received.
That is why to get people to over ride that basic feeling you either have to give them a monetary reward (vacuum cleaner salesmen) or a prestigious status within the group they treasure (pioneer).
Everyone else just goes along to get along.
We are whipped into guilt induced cooperation by being told its the basic command of our time (Matt 24:14) and by peer pressure from family and friends in the Org.
It took being out of the Org for me to realize that the good feeling I felt after service was NOT joy from service but a giddy relief that it was DONE!