They frequently do see things in that way - and they're wrong. In fact, they're worse than wrong, because many people see the dueling assertions of fact and give up on knowing the truth of a situation altogether. This is a classic disinformation technique.
We do have the ability to determine truth from fiction, it just takes more work than cynically throwing up your hands and smugly concluding all sides are lying.
We do have the ability to determine truth from fiction, it just takes more work than cynically throwing up your hands and smugly concluding all sides are lying.