Train a NN to generate pictures of the nightsky: which can be used for navigation? Who knows, ahead of time. The only way of knowing is to have an explanation of how the solar system works and then check the pictures are accurate enough.
The NN which generates photos of the nightsky has nothing in it that explains the solar system, nor does any aspect of an NN model the solar system. The photos it was trained on happened to have their pixels arranged in that order.
Why those arrangements occur is explained by astrophysics.
If you want to understand what ChatGPT can do, you need to ask OpenAI for their training data and then perform scientific investigations of its structure and how that structure came to be.
Talking in terms of the NN model is propaganda and pseudoscience: the NN didnt arrange the pixels, gravity did. Likewise, the NN isnt arranging rap lyrics in that order because it's rapping: singers are.
There is no actual mystery here. It's just we are prevented form access to the data by OpenAI, and struggle to explain reality which generated that data -- which requires years of actual science.