There are some people whose rhetorical goal is to bring the reader/listener to a point of numbness where they feel that the topic is too complex to understand and they defer to the expert. This is especially used when talking with those who agree with the premises and conclusion that the speaker/writer has. Thus the reader/listener feels good because their view has been supported by an expert, and the writer/speaker feels good because they have received support.
But in reality all that has happened is the linking of premise and conclusion with a bunch of wibbly wobbly rhetorical wimey stuff that isn’t a functional argument.
This leads to polarization of belief as camps grow around the speaker/writer and they are combative with other groups around a different speaker/writer who disagree with the premises or conclusions, but because the speakers/writers never actually educated their groups but simply provided them with unlinked premises and conclusions the two groups turn their backs on each other because to admit that they don’t understand it is to admit that they might be wrong. It is to admit that they hold the premises and conclusions not because it’s true but because they received confirmation of their biases from an “expert”. It is to admit that their proof is based not on truth but on a misunderstanding or misrepresentation of the evidence or of the opponents perspective.