Exactly, it's a kind of hubris that people seem to claim knowledge about the brain just by observing vague electrical signals from afar. The delusion comes from the fact that we seem to know a lot about the heart, the kidney, the bones, so why not the brain? Well, the brain's cells are communicating to each other in a network with trillions of connections, that's a major difference that seems to be ignored, and the other is that the each cell contains a nucleic acid code beyond our scale of understanding which runs all the time while those electrical signals pass through deciding its next messages and actions. If you ignore these two major bottlenecks, then you could be tricked into claiming knowledge, but it will be limited and, most of the time, wrong.