[faeriechangling]

Usually people don't associate the Middle Ages with "relativism", it's more known for the crusades which were hardly an endeavour rooted in cultural relativism, although there were certainly relativists in the Middle Ages.

As you say, determining and disseminating truth is not straight forward and I think you really have to read between the lines when you hear people say things like "Hear her truth" is that these are often people who allege certain classes of people have long had their actual testimony ignored by society because of who they are. Also most of the time people say this, they're saying this regarding fundamentally uncertain situations where uninvolved parties can never be 100% sure of the truth. So there is a political/practical/contextual aspect to these epistemological statements.