The ur-text for all arguments for poetry in the English tradition, Sir Philip Sidney’s Defense of Poesy is better than you think. Don’t let that archaic spelling in the title throw you off.
I have heard it described as being very Aristotleian, though I confess I don’t see it myself, except insofar as both are operating under the shadow of Plato and both attempt to answer Plato’s challenges with more practical than theoretical answers.
After first reading it, one of my thoughts was its timelessness. In both a good and bad way. If you made the language blander and more modern, you could slap David Brooks name on it and claim it had been published in The Atlantic under the title “Poetry is dying: I have a plan to save it.”
The plan is reject literary theory and focus on how poetry is of practical value, as a moral and pedagogical tool. Which isn’t wrong, but feels inadequate.