Soo maybe it's neither and just heavily dependent on a) the social circles you are a part of, and b) your personal bias towards pessimism/optimism? It's pure s

Soo maybe it's neither and just heavily dependent on a) the social circles you are a part of, and b) your personal bias towards pessimism/optimism? It's pure speculation, but it feels much more plausible than a society wide bias towards one or the other.