Some expectations are pessimistic, some are optimistic. Societies, over time, have gone up and gone down. So sometimes an optimistic perspective has proven rig

Some expectations are pessimistic, some are optimistic. Societies, over time, have gone up and gone down. So sometimes an optimistic perspective has proven right and sometimes a pessimistic perspective has proven right. The article has a decent argument why a pessimistic approach is plausible. Your examples don't anything particular specific and so they don't really give a case that an optimistic perspective is appropriate. I mean, optimism might appropriate but "change your view to see the good" is just kind of manipulative (something very common now, a reason for pessimism, sadly).