This happens, yes, But oftentimes preppers start off from rational or at least semi-rational bases, but then entrench themselves in the psychology you describe due to the sunk-cost fallacy.
For example: let's say you bought into Matt Simmons' peak oil hypothesis in 2008. The data is there. Hubbert's peak is a real phenomenon and mathematically, it will eventually happen. So you moved off-grid, spun up a sustainable, regenerative ranching effort, and started rolling over long-dated NYMEX crude contracts, losing your savings slowly for a decade and a half, while tight oil technology expired your options worthless, every single month.
Some people might say ok, I was wrong. Shit. Time to get back to the real world.
But many more of them will convince themselves no, it's just the timing, I was just a little early. See the Bakken and Eagle Ford production is already peaking, and the Permian Basin will peak in just a couple more years. THEN I'll be right. I have to be right. July 2025 will be my swan song. I'm going to go watch The Big Short again.
Humans are gonna human. And I suspect you're going to see a LOT more of the left-leaning, tech-bro type of this prepper emerging due to climate change concerns than you will of the traditional Bible-beating Soviet-EMP style of prepper in the coming decade.