For me, the difference is that there is no way in hell that I want to give an AI assistant full access to configure my system live. With a declarative config, the only access it needs is to an isolated git repo.
But if the declaritive file is not read/understood, what is the difference? At some point, you're gonna run sudo nixos-rebuild, and that is the whole system on the line.
This whole thing has been about explicitly using LLM instead of learning nix. So sure, definitely agree with about the niceness of using nix in general if that is all you are saying, but also not sure what you are trying to argue for anymore.