Why is the evolution of the brain considered to be so miraculous by creationists? It's clear that nervous systems evolved a long time ago, for example, worms have nerve cords running the length of their body, along with transverse nerves. At the head, there is often a ganglion, that is, a cluster of nerve cells. This could be seen as a very primitive brain.
Why is it so amazing that nervous systems should develop in complexity and size? It's no more amazing than the development of the eye, beginning with light sensitive patches of skin.
I suppose it's the old argument, it's complicated, therefore God.