Or even in the same field really. Being an "expert" doesn't make you omnipotent. Millikan, Rutherford, and Einstein were experts in atomic and quantum physics,

Or even in the same field really. Being an "expert" doesn't make you omnipotent. Millikan, Rutherford, and Einstein were experts in atomic and quantum physics, but it turns out they lacked the imagination to predict controlled nuclear fission. To be fair, it's a very non-intuitive process, but it just shows you how difficult predictions can be.