To me this sounds like a major misconception of what science is.
Scientists aren't expected to be infallible, let alone right at the first try. Science is an iterative process of building knowledge and understanding of how things work, which by definition means there's always stuff that is not known and misconceptions on how things work. The output of science is progress, hut the bleeding edge is often riddled with swing-and-misses.
As a clear example, see how the plate tectonics theory was addressed initially by the scientific community.