It is not confirmation bias. It is a different tendency.

It is a tendency to absorb whatever we read or hear - regardless of its information content.

IMO: Human languages evolved more for bonding than for conveying information. So, words exchanged were more to soothe the emotions of individuals involved rather than convey useful information about the state of their environment.

Hence we are fundamentally wired not to process the information content critically but to be soothed emotionally by whatever we read or hear