There are some subjects where this is correct and one side is definitely correct while the other isn't, global warming being the first subject that comes to mind. Global warming is real, there is scientific evidence of this, and anyone who doesn't believe in it is ignorant of this evidence.

However, there are many subjects where there is no single correct way to do things. How do we manage our culture? How does our society handle immigration properly? Should we promote certain ideals or family values? For these issues, if you _don't_ give both sides an un-biased chance, then you are picking sides.