Reason or Emotion?

I am responding to Meghan’s post question, which is “Why do we have phrases like "follow your heart," "gut instinct," etc? Why is it not like listen to what your mind tells you?”
We have phrases like “follow your heart” and “gut instinct” because people believe that your soul will know what to do over your conscious perception of things. In the desert for example, you see mirages even though there is nothing there. Your mind tells you that the images you are seeing are real, even though in your gut, you know that you are just hallucinating from dehydration or some other effects. Also, to say just listen to what your mind tells you, doesn’t leave a tone of emotion in it. When the phrase “follow your heart” is used, I interpret it to mean that even if there is way to benefit from something; if it is morally wrong then you shouldn’t do it. Basically, (opposite of what Plato believed), we should value emotion over reason. I agree with the phrases because I think that emotions are an important part of decision making and I would not want to make decisions without them.
Would you want to live in a world where decisions were based off of reason without emotion?