I find value in the popularity of a comment because it gives me some insight to how a community thinks, collectively.

I've observed a number of times that the most popular web sites and the most popular news sites (as ranked by web traffic) are the most controversial (eg. sexist) and least informative. Hence, trusting the average person is like trusting populist politics.. The Kardadhians rule. Aka race to the bottom, aka McDonalds journalism.