Doomsday preachers would love your argument here. They've been wrong over and over, but doomsday is eventually coming! The sun will explode, heat death of the universe... sooner or later, something will spell doom for the human race. Doomsday isn't wrong, it's inevitable!

This is such a ridiculous argument, I don't even know where to begin.

I mean, do you imply that every thing that is bad which we can see coming is not going to happen because 'doomsday preachers would love it'? I hope you can see how absurd this is.

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.

Yes and at some point the sun will destroy earth. If Peak oil just means 'all resources are limited' then its an insight that an empty bottle of water could have made. It has no relevance for the real world.