I agree that both viewpoints will be opinions based upon facts or theories. There is a saying that goes something like "Don't argue with someone unless you know their side better than they do." I feel an author who understands both sides of an issue could write to an audience in a way that is meant to purely inform them about both sides opinions.

You could also do it as a debate where two respectable, well-informed and well spoken people debate following strict rules. Pretty much the opposite of a US Presidential debate. Without it being a live debate, both would have time to give their statements plenty of thought and consideration. They could then take the time to make sure it is well written.