https://www.merriam-webster.com/dictionary/propaganda

1 capitalized : a congregation of the Roman curia having jurisdiction over missionary territories and related institutions

2 : the spreading of ideas, information, or rumor for the purpose of helping or injuring an institution, a cause, or a person

3 : ideas, facts, or allegations spread deliberately to further one's cause or to damage an opposing cause also : a public action having such an effect

so.. quite a few things are propaganda.

it's not really so scary a term, and so being not so scary, we can see it more clearly and not be afraid of labeling it.

the question is more "is this good propaganda or bad propganda?"

https://www.jpl.nasa.gov/visions-of-the-future/