I think your analogy is lacking. Human brain is much more efficient, so it is not right to say "giving a human team a week instead of five hours". Most likely, the whole OpenAI compute cannot match one brain in terms of connections and relations and computation power.
As always with these comparisons you neglect to account for the eons necessary for evolution to create human brains.
But as a product of evolved organisms, LLMs are also a product of evolution. They also came several hundreds of thousands of years later.
so in that case, don't compare them to humans in the first place