Many people may believe science is the most reliable arbiter of truth but in terms of people's specific beliefs it is their exposure to and understanding of a limited subset of all science performed that will determine them.
No person has a deep understanding of all science and even supposed experts may have biases that determine which science they accept and which they reject. That's why we have continued scientific debate in all fields involving any level of complexity.
The idea of "settled science" is too often a marketing term or it may describe an area where all accepted scientists are conditioned to share the same perspective. It doesn't mean other views are not possible or that they are "unscientific".