But brain still is "just" a neural network, granted, with immensely more complex neurons and extraneuronal mechanisms that might as well be absolutely crucial f

But brain still is "just" a neural network, granted, with immensely more complex neurons and extraneuronal mechanisms that might as well be absolutely crucial for learning. But the difference between a highly intelligent and blank-stare person can be as small as switching off a small part of the brain or tweaking a neurotransmitter. Which shows me that general intelligence is something extremely sensitive as oposed to something like vision processing, which takes much more drastic changes to disturb. Looking at the brain, it often does look like a bunch of interconnected specializes neural networks.