I think my central mistake here has been using the word communication in place of literary expression, which carries with it a magnitude of efficiency and specificity that art elements cannot achieve. I did this in trying to work with the contextual uses of the terminology and I think it waters down my point. Sorry for the confusion.

The Wikipedia for Poetics does appear to lack an elaboration on Aristotle’s more critical positions on poetry. The exact nature of his criticisms are contested (but their existence is not) so maybe that is why. Check out thes Quora entries for some relevant discourse:

https://www.quora.com/Why-did-Plato-hate-poetry