I don't want to sound dismissive, but that's the naive answer. Transparency may make it easier to understand for the 95% easy cases, but doesn't help for the rest and may even be counterproductive. Think about shadow-banning (even HN does it): it's very effective because it's based on the absence of transparency. Sometimes people do bad stuff and you don't want to tell them everything you know on the case because it may tip them about who reported these things (think about harassment/doxxing cases) or how you investigated it and so help them change their strategy next time (think about spam issues).