Pretending that facts cannot be manipulated is fundamental to propaganda, regardless of color. A big discussion of facts, experts and opinions is a way to escape addressing the ubiquitous propaganda problem.
Sure, its an opinion with no facts about fact based assessment. Assuming this person is an unbiased observer and a well prescient one would be a mistake.
To your context, it simply means you havent seen bias in the facts, but dont evaluate the completeness thereof.