There is no reason to copy the human brain to create AI. There's a lot of extra stuff in there that's not needed. Creativity is being done just fine without copying the brain with stuff like Stable Diffusion. This is yet another "humans are special" article from somebody that can't comprehend humans are not special and the way our brain works is not the only way for intelligence to function.

Given how fast AI can work, once it can create software on it's own without human help we can expect things to move very fast. Think of Copilot but instead of needing a human to hand hold it, you can just tell it what you want and it can code the entire thing from scratch.