The reason is people are not so naive. In 20th C., affiliating your position with [Science] has often just been short hand for [Trust Me]. It has been a way to dress up mutton as lamb. Only a certain kind of person argues: I know the all the facts. I am 100% right. They are usually (1) people who do not know what they are talking about; or (2) people who [bracket] their scope of knowledge to the subset of things that [conform to their education/training/expertise], but then extrapolate further. And, everybody knows, politics covers a broader scope of ambition and emotion. Certainly, broader than what is taught [in XYZ school]. It covers hopes and dreams [mlk, ghandi]. As well as other more base instincts [20th century wars, etc]. So, there is no [expertise] in politics that is an academic credential. And to substitute an [academic] [science] credential and call it an [expertise] in politics is dressing up [mutton] and calling it [Lamb]. Its just short hand for [Trust Me]. And the reason people do not buy that? The reason is that people are not so naive.