So many people seem to have this weird misconception that there can be no right answer to something just because one political party disagrees with another on it. I wish people would entertain the possibility that either side might actually just be wrong about things sometimes (often trivially). (hypothetically) It would not be "bias" to talk about one side being wrong much more than the other if that was actually the case.
I think a lot of people use this fallacious call to "give both sides an un-'biased' chance" to derail discussion in a very intellectually dishonest way when we should be reasoning about things without turning them into political arguments.