As we connect and communicate with people, ideas, and experiences that are different from our own we grow, we learn, and we heal. These are some of the good reasons to dialogue through differences.
It isn’t that science plays doesn't role in supplying evidence relevant to undecidable propositions. For example, science can lay out the mechanics of the human brain systems that contribute to our making moral judgments (at least two are currently identified, one running off rational assessment circuitry, and another more snap judgment system riffing off our emotional amygdala network).