It’s not “reasonably unbiased” or whatever we want to call it. Even if we want to believe it’s possible, the very existence of SEO invalidates it. You push yourself to the top by using techniques that have little (often nothing if we’re honest) to do with the merits of the information. Rankings literally do not correlate with quality or lack of bias. It’s about the specific words you use, the way your site is formatted, engagement, etc. None of that is reflective of the quality of information.
As I said in another comment, just look at “Google bombing.” There was a time when people would mount public campaigns to artificially drive pages to be associated with certain words, like I remember when people made it so if you search “failure” you got “George W. Bush.”
To use a different example: it would be like saying we know the quality of a car because of how many units sold. The driving force could be many unrelated factors, like the visual aesthetics, the feel, etc. which don’t tell you anything about the MPG, the upkeep, and other info most of us would consider key indicators of quality.
For a long time there was a decent correlation with the quality of the information and how far up the Google search it sat. But you are putting way too much stock in the quality of that information. It has always required heavy scrutiny.