> The best lack all conviction and the worst are full of passionate intensity.

Every time I read this poem it nails something.

Incredible sense of tension and dread.

It’s fitting that you would quote Yeats, yet another guy who predicted an apocalypse that never came.

It's a poem by a poet published right "the Great War", so I'm not sure what kind of predictive-standard you're trying to apply here.

More generally, predicting a disaster is sometimes an important step in ensuring it never occurs. Self-negating prophecies can have high utility.