I liked the part in the movie "The Simulation Game" where Turing talked about "thinking differently" and that while a computer may have a form of AI it would be different than a human intelligence.
if it takes us a massive number of transistors to make something that functions on the level of a simple organic net work like a bugs brain then there is something wrong with the tech used.
until we find a better analog I do not think we will have a real "AI"
also we are not digital. I wonder if we need to create a hybrid system with some analog elements and some digital to get closer to making a "Real" neural network.
but is this work pointless ? doomed to fail ? I think it is part of our human drive to create and pro-create that drives us to create a synthetic counterpart.
Evolution doesn't always discover the most straight forward solution to a problem. When people thought to make a machine that could fly, they thought they needed to emulate birds. This made it a lot harder then necessary. We may sometimes take inspiration from biology, but we are looking for theories underpinning learning and intelligence that we can make mathematically rigorous statements of optimality from.