But lacking the facilities and memories of five senses, a computer cannot possibly understand most human utterance except by responding with conventionally associated words and meanings. It wouldn't be much different from the original online psychotherapist Eliza. Accepting this, and it is impossible not to, requires a poet to give back authority to language that linguist and politicos have taken away. Because language is as much of the flesh as the mind is, and as inseparable. Further, it is arguable that most of the assaults on language have been motivated by poor exercise of its expressive power, whether in propaganda or in bad poetry.
Language has no other function, although it has vast spaces in which to play.
As the medium of poetry is language, poets cannot use it for other means without producing the kind of gibberish that some scientists and political theorists claim to be the best that language can do. This is not a new idea. It meant to him that the book had been used to its very ruin. Go through an Auden poem and try to find clumsy usage, or a gross error in meaning. It's not likely that you'll find much.