This is an excellent, sophisticated answer. Have some Nietzsche quotes that fit well with this; and indeed, I think fiction serves one of its major roles by making visible darkness safely, so that it can be considered and analyzed, rather than ignored. And by being concrete, rather than abstract, such considerations become available to all people, not only abstract thinkers.

If ignored, "darkness" is liable to appear randomly and prevent real progress in the direction of light. Whereas if both considered, then correct tools can be selected to achieve what is worth achieving.