The difference is whether you are appealing to the listener's logical faculties. Reasoning with someone feels somehow more respectful and authentic than pulling linguistic tricks to bypass their psychological barriers.
Sure, but being respectful isn't a goal. The goal is to get the other person to agree with you. If the facts are on your side, that's great, but sometimes they aren't, and sometimes you can't make a persuasive case based on the facts even though they are on your side.
I guess I was trying to elucidate the uncomfortable feeling that OP had about "Logos" being lumped in with the rest. I'd say that it's worth weighing up on a case-by-case basis whether the need to persuade overrides the value of respect for others.