IIUC, you believe that (a) using a tool like Notion is a useful brain-multiplying lever vs. struggling to keep everything in your head, but (b) using a tool like an LLM is a harmful brain-rotting exercise vs. struggling to do everything with your head.
In your opinion, what is the differentiating factor?
Using a tool like notion is organizing your thoughts into a coherent structure so that you can reexamine them. Running that coherent structure through an LLM replaces your structured thoughts with other thoughts you didn't have. You've gone to all this trouble to record your memories so they don't change, and then you run them through a machine that replaces your memories with randomly generated ones.
I think AI is a great tool in certain circumstances, but this sounds like one of the clearest examples where it is brain rot.