Speaking of non-political side of him: was not he wrong about "innate grammar" necessary to understand langage? LLM do not have such circuitry, yet they somehow work well...
No. Innate grammar has always been about how humans aquire language, not how any possible system which understands human language must posses that innate grammar.
Therefor a human with no understanding of grammar/language, and using no innate biological circuits, could process grammar and respond with language.
The flaw in this argument would be how to teach a human to do this without grammar ...