This was posted before and there were many good criticisms raised in the comments thread.
I'd just reiterate two general points of critique:
1. The point of establishing connections between texts is semantic and terms can have vastly different semantic meanings dependent on the sphere of discourse in which they occur. Because of the way LLMs work, the really novel connections probably won't be found by an LLM since the way they function is quite literally to uncover what isn't novel.
2. Part of the point in making these connections is the process that acts on the human being making the connections. Handing it all off to an LLM is no better than blindly trusting authority figures. If you want to use LLMs as generators of possible starting points or things to look at and verify and research yourself, that seems totally fine.