A Microsoft researcher built a goat-powered LLM in Age of Empires II to prove it's not sentient
(www.xda-developers.com)
"If you captured and simulated every neuron in the human brain, you’d be left with a feedforward process simulating a particular neural state of a particular person. No feeling, no reflection, no introspection, no semantic meaning. Just a neat toy."
Seems to me you think there's something special about humans, I don't believe there's any proof to that.
Yes its orders of magnitude more complex then a fly brain, that doesn't mean it's impossible to simulate.
There's no proof to a soul, our whole existence is our meat which evolved naturally over extreme timescales via random forces and natural selection, I see no reason to believe we could not do the same with our intelligence in a much shorter period of time comparatively.