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.
