From the conclusion: > First, the fact that language models can be trained on large amounts of text data and can generate human-like language without any explicit instruction on gram- mar or syntax suggests that language may not be as biologically determined as Chomsky has claimed. Instead, it suggests that language may be learned and developed through exposure to language and interactions with others. I'm not a ling…
It doesn't. Also, the author doesn't seem to actually understand Chomsky's writing about language, because learning language via exposure is how humans learn languages and he fucking mentions that in his writing on the subject.
UG (universal grammar) is the purported facility in the human brain which makes language possible - it has a innate structure, but it learns particular languages from exposure. Chomsky doesn't state exactly what that structure is because he doesn't know - figuring that out is goal of his work.