I think you're missing the point. It's not helpful to demand constant attention to a bad thing that is eventually coming if you are always extremely wrong about

I think you're missing the point. It's not helpful to demand constant attention to a bad thing that is eventually coming if you are always extremely wrong about the timescale, and it is in fact much further off than you have said. The mere point that something bad will eventually happen is trivial and doesn't help civilization prioritize. "X is technically still coming" protects the credibility of the end-of-X preacher, instead of engaging with the more important point that the end-of-X preacher has been hopelessly wrong to the point that it's no longer helpful to listen to them.