You just described every sports writer in the history of sports journalism. Actually, you just described every journalist in history.
I don't know that all journalists do this. But there's some truth there I suppose. Everyone has biases. Some of them just hide them better than others. In general though I think that if you're incapable of appreciating anyone's opinion but your own then you shouldn't be a journalist. And a lot of people who are journalists probably shouldn't be.