You almost lost me with the first sentence. It is scientists who hope to find a grand unified theory (GUT), not quantum theory itself. And the universe is not an entity, so it cannot be anthropomorphized. Just as quantum theory cannot hope, it is a personification to attribute human characteristics to the universe.

If your use of the term ‘bio-mechanical’ is synonymous with genetic, I would agree that our tendency toward belief is likely a vestigial relic which conferred a survival advantage. Our understanding of reality will always remain incomplete, as there will always be more knowledge to acquire—we know of no end to the universe, including what precipitated the Big Bang.

I agree with your conclusion that human beings are incapable, at present, of moving beyond a certain point, due to our limited sensory awareness and our evolutionary and cultural biases. But this shortcoming appears likely to be overcome by a higher intelligence that we create. Our successors are likely to be artificial, whether fully apart from human beings, or implants that significantly alter our physiology and vastly enhance our bio-mechanical capacity.

New detectors will be designed and data collected on phenomena we have yet to imagine. Whether we dread this or not, the singularity that Kurzweil and others have predicted, will occur, and solving the GUT, as well as the theory of everything (or TOE, which incorporates gravity) will become a walk in the park—a launch point for future discovery. I can only hope to be there on the Cayley plane!