Naturally, framing an opinion on a subject by definition exposes a bias, or preference, on the part of the writer. No problem there. However, your presentation does not clarify that the biased account that foregoes justification, explanation, or validation — that is, which does no more than establish an opinion without support, is worthless. Journalists who operate as pundits have a responsibility to tell their audience why their position is the ‘right’ one. Failure to do such is unforgivable, and provides readers with a reason to opt not to read any more opinions.