Yes, I realize that a human genome is sort of a source code to our behavior, but having it without a complete theory of physics is rather like being given the source code to an AI in an unknown forma

Having the exact laws of physics here probably doesn't matter as much as simply having a better understanding of human development. The genome isn't all that matters. What proteins are in the egg at the start matter a lot, and there are things like epigenetics. And the computational level involved in trying to model anything in the human body reliably is immense. The fundamental laws of physics probably don't matter much for human behavior.