Living, growing, changing cells are pretty damn dissimilar to static circuitry. Neural networks are based on an oversimplified model of neuron cells. The model ignores the fact neurons are constantly growing, shifting, and breaking connections with one another, and flat out does not consider structures and interactions within the cells.
Metaphysics is not required to make the observation that computer programmes are magnitudes less complex than a brain.
This isn’t something that gets solved by just hoping people’s individual lifestyle choices fix it. Production has to be scaled back, and market economics is clearly not capable of that sort of conscious decision making.