When a speaker uses their feelings for a speech, you can tell that they are invested into what they are talking about. If someone were to go up in front of an audience and just start listing facts, that would not be nearly as interesting as someone pouring their heart out on stage with all the emotion they have about a certain topic. Even though I believe feelings to be more important in a speech, it cannot all be feelings, you need to include facts. A fully factual speech is credible, but a fully emotional speech is not due to bias.
I agree that neither extreme is better than the other. A good and powerful speech includes both logic and feelings.
I agree that one thing cannot necessarily be more important than the other. Both feelings and facts need to help balance each other out to create a good, 'credible' speech.
I agree that it is important to express your real emotions in a speech and also important to list facts that would support why the speaker is having such emotions. Giving it a perfect balance between the both.