That’s a connotation it has gained, but is not the literal definition.

The term originated from religious missions using it to refer to propagating the faith, and was later adopted by revolutionary leftists to describe their attempts to spread their ideology. It gained a negative connotation, ironically, from anti-communist propaganda. Communist states used the term openly and neutrally to refer to both their own propaganda and that of their enemies’, while capitalist states used it derogatorily only to refer to communist propaganda and not their own (they tended to use various euphemisms to refer to their own propaganda without calling it that explicitly).

Propaganda is not necessarily deceptive, though it can be. The word has gained a negative connotation over time but it just means systematically disseminating information in support of a doctrine or cause. That can be any doctrine or cause, and the information can be true, false, satire, or pure opinion. Propaganda is a neutral term and the internet has made producing it so simple that almost everyone has done so.

It’s because a lot of them haven’t taken that first step of getting out and taking action IRL. When you do it becomes obvious very quickly that peaceful protests and legal maneuvering are important parts of a larger resistance movement, and that they aren’t mutually exclusive with more direct action like obstruction, sabotage, and civil disobedience.