There is a redemptive element to some classic whodunnit crime fiction. Wouldn’t it be nice if there always was a Sherlock Holmes or Lord Peter Wimsey who can make sense of it all, rescue the innocent, and determine the truth? And, to temper justice with mercy, even if it means going outside the law? Conan Doyle was heavily into spiritualism. Dorothy L. Sayers wrote heavyweight books on Christianity. There may be others.
I can’t take horror, cruelty, and violence, myself.