You are conflating no answer with no value in having an education on the subject.
A mathematician may not have a solution to the Riemann hypothesis, but is certainly more informed than a layman.
Similarly, people who have studied politics, philosophy, or ethics may not have a definitive answer on a particular topic; however, to argue that a layman's answer is of equal value to that of an educated expert's answer in that domain is disingenuous. Furthermore, there are certainly quantitative elements to both political science and international relations.
Yes, there are some subjects that are qualitative, with no definite answers -- however, that does not mean that all answers are equal.
However, you cannot conflate faith with these other subjects, not even theology. Indeed, theology is different from faith because it is the study of religions. It is not the same as "belief", which has no grounding in any reality.
That is not to say that faith is any less valuable -- merely that it is not in the same league as any of the other subjects that you mentioned.