The notion that we can fully understand how the universe works may be a overly optimistic belief. There's no inherent reason to assume the universe is structure

The notion that we can fully understand how the universe works may be a overly optimistic belief. There's no inherent reason to assume the universe is structured in a way that human brains can comprehend. Even if we are fortunate enough to have a universe that is understandable by humans in principle, there is no guarantee that a falsifiable theory that explains everything exist. Some people assume that we could eventually formulate a theory of everything or have a complete understanding of QM, but there is no scientific evidence to support this belief. All we have are equations, like the Schrödinger equation, which provide accurate predictions of physical phenomena.