Whatever IMHO is supposed to mean, I don't really think it is intended to be "convincing." It's just politeness, etiquette, a form, a ritual. For example suppose two humans meet. They need to acknowledge each other's existence and reassure each other of peaceful intentions. They don't want to give the interaction a lot of thought. They perform a ritual. "Hello, John, how are you doing? Fine, Jane, and you? Fine." Neither the questions nor the responses are "sincere" but they are not intended to be. I think of such forms of etiquette as the oil for the social machine.