ALL plays, movies and TV shows are created to promote an agenda. The story line is designed to pull you in, and to get you to willingly suspend your disbelief. With your critical thinking put aside, the producers slip their message into your relaxed mind.
There is no entertainment. It’s all propaganda.
That is absurd. There is no way ALL entertainment is propaganda (though much of it is). What was the agenda of "The Beverly Hillbillies"?