Foreword: Just My Opinion™
Pessimists are creatives who are able to see the worst possible outcomes. To me, this means we have people who are able to effectively sound the alarm, and it’s worth at least listening to what they have to say.
I feel Pessimism is shunned nowadays because it comes close enough to Realism so as to be uncomfortably familiar, as what we’re seeing unfold is one of the worst potentialities we had at our disposal (I think most if not all of us agree that we couldn’t have anticipated a dystopia THIS fucking stupid).
In a healthy society, however, one in which things work in favour of the citizens and every soul has the necessities of life assured, Pessimism would serve as a cautionary element. It would demonstrate the disasters we’re avoiding or will have to avoid.
I feel this has always been its role, from Ancient Greek Tragedies to contemporary dystopian sci-fi, but somewhere along the way it became something to be avoided like the plague (see Toxic Optimism/Positivism).
Well, hey, fully valid that I may be biased in a similar way, but in reverse, having been surrounded mostly by people who refuse to see The Darkness even if it’s actively slapping them… In either case, I agree with you, it takes a balance between them, as always!
You’ve actually expressed my point way better than I have, so I guess that bias is at least present in the direction from which I approach expressing the idea:-?