This idea is rational but politics isn't, due to things like:
Decades of long-term deliberate misinformation.
An uneducated public with many totally vulnerable to misinfo.
Believing what you hear has been a long-term evolutionary survival trait, and we are all affected by what we hear - and repetition can cement a belief almost beyond remedy. Another evolutionary survival trait is to belong to a group. Given these two traits many are convinced of their "truths" whatever they may be. Since these "truths" may or may not be actually factual, I do not see how it can even be agreed upon what "issues" even exist or can be debated upon. Remarkable most of us are pretty rational within the context of our jobs - yet often not in other contexts.