To rephrase, I don't think most discussions around policy involve providing peer-reviewed studies with relatively conclusive evidence in regards to a potential policy change, or objective evaluation of the communication, legislation and vote records of politicians. It is too easily converted into ad hominem attacks, bold assertions that one might believe have evidence but if (quite) thoroughly investigated might be disproven. More regularly each side dismisses the other based on strongly held beliefs formed on very shallow investigation.
[0] https://www.v-dem.net/en/publications/democracy-reports/ (specifically https://www.v-dem.net/media/filer_public/de/39/de39af54-0bc5... PDF)
[1] https://journals.sagepub.com/doi/full/10.1177/00027162188187...