You forget one thing: we have people reverse engineering biological neural networks from various perspectives. We got to deep learning because Mountcastle, Hub

You forget one thing: we have people reverse engineering biological neural networks from various perspectives. We got to deep learning because Mountcastle, Hubel and Wiesel reverse engineered the visual cortex of cats. That was the starting point of Fukushima's Neocognitron, the ancestor of the deep learning stuff you study today. Then, only a fraction of our brain is used on cognitive tasks. The rest is used in motor tasks and taking care of autonomous tasks like regulating your heart, glands and such. Things will happen faster than you think.