Unless the adjudication is secret, it creates a weird problem: what starts out as an unknown ("did the harassment happen or not?") becomes a fact ("he was fired for harassment"). That fact could follow the accused the rest of their life, and others may make judgements based on it, even if the original harassment claim was bogus and the adjudication a charade. Even of the accused finds exonerating evidence later, there would be no process to reverse it.