I'm quite sympathetic to poetry - I actually wrote a blog post about this article last week https://gallant.dev/posts/whither-poetry/
But much like the "debate" between linguistic prescriptivism ("'beg the question' doesn't mean 'raise the question'") and descriptivism ("language is how it is used"), both perspectives have relevance, and neither are really responses to the other.
I certainly hope people keep writing great, human, poetry. But generative ML is a systemic change to creative output in general. Poetry just happens to be in some ways simplest for the LLMs, but other art is tokens and patterns as well.