I'm rather confused by this statement. I've read a number of Chomsky pieces and have listened to him speak a number of times. To say his theories were all "not true" seems, to an extent, almost impossible.
Care to expand on how his theories can be taught in such a binary way?
GP may be referring to the idea that language is innate like an organ in the body/brain. The Kingdom of Speech by Tom Wolfe is a great read exploring Chomsky and other thinkers in this realm. It would have been great to see what he thought of LLMs too.
Generally what people are talking about are his universal grammar or generative syntax theories/approaches, which are foundational to how you approach many topics. Because you build your academic career based on specialization they are hotly contested (for the material reasons of jobs, funding, tenure, etc.).
This leads to people who agree hiring each other and departments ‘circling the wagon’ on these issues. You’ll see this referred to as east vs west coast, but it’s not actually that clearly geographically delineated.
So anyways, these are open questions that people do seriously discuss and study, but the politics of academia make it difficult and unfortunately this often trickles down to students.