I used the "map is not a territory" to describe this context in the article about visual programming [0]. Code is a map, territory is the mental model of the problem domain the code is supposed to be solving.

But, as other commentators mentioned, LLMs are so much better on reading large codebases, that it even invalidates the whole idea of this post (visualizing codebase in 3D in a fashion similar how I would do it in my head). Which kinda changes the game – if "comprehending" complex codebase becomes an easy task, maybe we won't need to keep developers' mental models and the code in constant sync. (it's an open question)

[0] https://divan.dev/posts/visual_programming_go/