Your question uses rather loaded language which also appears in the wikipedia entry on propaganda. (I don't know if you are quoting it without reference or if both quote a third source ...) Wikipedia is often helpful, but it is not an objective source, especially when it comes to contentious entries.
- Rosie the Riveter was part of a deliberate propaganda campaign during wartime.
- Propaganda usually has negative connotations when it comes from the other side, positive ones if it comes from your side. The word propaganda was used by the Nazis, and it is part of the term agitprop used by the communists. Meanwhile Hollywood produced movies like Mission to Moscow because of their artistic merit, I guess.
What does this question have to do with worldbuilding? When you describe a world in a story or a game setting, and make choices available (or unavailable) to the characters, you write a piece of propaganda. In the best stories this is subtle, and critics will argue for ages. In the worst stories the writer decided to be unsubtle, or didn't even realize what he did, and the story is just crap.