I recall reading, I don’t know where or when, a book analyzing Plato’s call to outlaw poetry. If I can reconstruct their striking conjecture as a pale ghost-image, it amounted to the following: within Ancient Greece, all societal problems were solved by performing a ‘biblical’ exegesis of The Odyssey. If two parties were in disagreement, Homer was called to the fore, and each side would make their case that their position best sided with Homer. Plato, then, was not out to forbid the high school production of King Lear or the publication of Yeats, but the dismissal of a way of life that was antithetical to his own. Problems could not be solved by appealing to an authoritative text, and with no view of precedent, but through universal law.
I do not know if this interpretation was correct, and I suspect that it is mistaken; however, it is still quite interesting, and in its defense, there are historical parallels: in The Eumenides, Aeschylus ends the ancient blood feud between the Furies and Orestes by way of a hung twelve-person jury. The Greeks show their progress towards unification of modern law and abandoning the ancient ways by way of an allegory. It may be wrong, but it gives a reading that makes far more sense to modern ears than the initial modern reaction to Plato.