an astute observation, but I've discovered (and am thoroughly convinced of this) that it IS possible to force yourself to have an open mind, and then go read stuff from both sides of the 'aisle', and the sum total of that endeavor is to be more and better informed and accurate.
when i do this, one of the ways I test myself to see if it's working is I think well Isaac, you can't be right on every big and little subject, so how often/when's the last time you changed your mind on something based on reading all the viewpoints? If the answer were 'never', or 'almost never', i'd know my method wasn't working. However, my answer comes back 'fairly often' (if I count all subjects great & small), so I think it's working. And from that I may develop a sense of pride in it, but not moral superiority.
honestly, there was a time when I wouldn't have thought it were truly possible to be significantly less biased and learning from a much-less-biased lens. But a lot of what I have learned about humbling one'sself to have a truly open mind despite previous convictions comes from the A.A. program, which is quite a beneficial thing - for anyone really, addictions notwithstanding.
We are all morally bankrupt without God's grace, and we can all accept God's grace any time we choose to - and let me tell you, God will totally make life better!- A lot better