Something I always noticed is that they get Morgan Freeman to do voiceovers for science shows, but he’s not a scientist so he has a sort of generic inflection when he talks about the various ideas in the script. And then you watch Carl Sagan’s COSMOS, where he co-wrote the material, and there is so much depth and expression to his delivery. There’s a lifetime of public speaking, specifically delivering complex scientific topics to a general audience, that Sagan drew from when recording his show.
Sagan would have learned this through conversation with people, and careful updates to his expression and delivery as he matured.
I guess an LLM could improve upon previous methods but I would also say there is a gap that even humans struggle with, which requires really complex knowledge both of public speaking and of the material. It may be a long time before we can really master that with AI systems.
