I know you have the answer to this from your vast experience of cheating, being cheated upon, and going through divorce. While a shallow answer is it provides legal protection, the difference is much deeper than that. It is a choice of action that defines who you are. And the proof is that it matters to you.
Was just noticing this which was apparently in response to what I wrote. Huh? None of that applies to me. Never been divorce, etc. Are you trying to say that people would only have my viewpoint if they've been wallowing in dishonesty and resentment from a divorce? I don't think so.