As long as you pick one definition and stick with it, you can define propaganda how you want. But this is not what people do. They juggle two definitions of pro

As long as you pick one definition and stick with it, you can define propaganda how you want. But this is not what people do. They juggle two definitions of propaganda: one broad where anything used to convince you of something is propaganda, and one narrow where it by definition is deceptive. It's the original "no true Scotsman": there the broad definition (Scotsman=person from Scotland) is used to argue for the narrow definition ("real" Scotsman=good and upstanding person from Scotland)