Reminds me of the little boy that cried wolf. The thing is, the wolf eventually came!
I'm pretty sure most predictions of a dire future are wrong. I'm equally sure we are going to discover things are going to get very bad, very quick some time in the future. It will come as a surprise and everybody will tell us how they warned us about it.
Only in the last century and for the first time in human existence have we had the ability to wipe ourselves out. We might come close.