A public expectation it has to be said not of poetry as such but of political positions variously approvable by mutually disapproving groups.
I've hung out at dozens of playgrounds bored out of my mind with not even a look of comfort from disapproving mothers all around me. Either they think I'm a pedophile or a deadbeat dad. That's what I get for being a single dad - suspicious looks at the playground.
If it's a good movie the sound could go off and the audience would still have a perfectly clear idea of what was going on.