That’s assuming maths is the fundamental building block of our brain, our consciousness. I happen to think there are some physical and chemical givens preceding it :)
Our brain is whatever evolution found that worked, and of course it's a bunch of chemistry. The "why" of why our brain works can easily be "it approximates these statistical algorithms well enough."
I merely meant that top mathematicians are substantially smarter and can work with concepts that are beyond the reach of even top programmers. We are generally good at recombining existing building blocks and using existing tools. Mathematicians can build new concepts. If I had the money, I'd try to convince the top mathematicians to work on AI full time.