The culture has a bias towards positivity or viewing the glass as half full rather than half empty. This is not strictly logical, but is an emotional defence. Many people find that looking at darkness or problems brings them down. They want hope. In my view, humans created a god so we could feel better about ourselves based on the belief that we were made in its image, whereas it seems to me actually it was created in our wishful image. Hubris. Anyway, it's simply a cultural bias. All cultures have blind spots and weak points. In general, people are ruled much more by emotions than logic, both personally and culturally.