If I was an editor, I wouldn’t want to explain my decision to a writer if I rejected their work. Somehow, I get why editors generally do this. A decision may fit the editor’s criteria for rejecting a piece, but a decision can also be quite subtle and lucid rather than fully defined. There’s just this sense that a piece is not quite right. So, the editor passes on it after due consideration and an explanation should not be forthcoming from a subtle sense of uncertainty over a piece. How could you define it? So, writers should be assured that sometimes there are not explanations for rejecting a piece — the feeling just wasn’t right. Anyone should be able to ascertain this through their own decisions over selecting or rejecting things where, sometimes, the feeling is the basis for the decision and it just didn’t feel right. I know I do.