Don't we usually find that most of the times people predict some disaster befalling society due to the exponential growth of something, it ends up hitting a limiting factor that stops the exponential growth?
But also, merely surviving is not the problem trying to be avoided. It’s all the decrease in quality of life on the way to adapting to the scarcity of the resource (which very well could mean thinning the herd) that is the issue.
For disaster scenarios, we benefit from extreme caution.
Arguably we haven’t done enough of this, if you look at e.g. global climate change. We may yet be able to avert a huge disaster, but even if you just look at the local damage like intensified tropical storms, or wildfires, that’s quite a big deal.
None of the fear-mongering ever seems to come true.
I mean, "bad things will happen if we don't fix the thing" is not fearmongering if, after the thing is fixed, bad things don't happen.