[SifJar]

If you have to represent "both sides" (in many cases there'll be more than two sides really), you end up having to give a voice to nutjobs, plus you present both sides as equally valid assessments.

Much as we'd all love an "unbiased" news source, the reality is that bias is a very hard problem to solve well.

[moomin]

Indeed, just repeating what people say about an event may be factual, but without any concept of what is actually true, it can’t be considered objective.

If one side is lying, objective reporting would tell you which side it was.