There are (at least) 2 sides to every transaction or interaction. Every time someone narrows the frame to eliminate all but one position, they are either:
a) intentionally attempting to manipulate the conversation in a particular direction, to influence the outcome in a way that favors their preferences (propaganda)
b) deficient in the empathy required to understand a different valid position (or possibly even to understand that there are different valid positions)
the psychology of naive realism: "everyone is influenced by ideology and self-interest. Except for me. I see things as they are."