When you are giving a speech it is important to balance your emotions and logic so you can connect with your audience and make your message more clear. Logic helps you organize your ideas and give strong reasons. Logic makes people's speech loud and clear with a really clear point. But emotions are what make people care more about the speech that they are listening to because they help your audience feel something such as being motivated or sad it all depends on the emotions you are expressing in your speech. If a speech has no emotions, it can be boring. If it only has emotion and doesn't have good logic or reasoning , it will feel confusing. A good speech is applying and balancing both logic and emotions to express how you truly feel about a topic or subject to influence your audience in a way or another.
I like your reasoning for what you said in this post; specific and sure.