Earlier quoted context omitted.
What bothers me about pictures like that isn't so much having to cram through the tight space. It's the cave collapsing and being squished to death with a 0% chance of survival. Do other people who are semi-claustrophobic fear the literal tight place, or dying from something going wrong that's out of your control? The same thing applies to heights. I have no problem with heights at all but ladders bother me a lot bec…
You live in a universe where astronomical events lightyears away can obliterate life on earth with no advance warning whatsoever. Being in control is an illusion.
Oddly, this reminds me of my mild fear of driving. I can't ignore the fact that at any moment while driving, I or anyone driving near me could apply a few paltry newtons of force in a way that causes massive injury and destruction, changing or ending lives. Every time I get behind the wheel, I have to wonder at how casually I'm about to pilot a huge mass at lethal speeds around hundreds of other people casually doing the same thing. There's nothing I can directly do to affect the mistakes of others, but I accept the risk of freak accident and resolve to do what I can to at least reduce the risk of disaster (drive defensively). Analogously, we all accept the (demonstrably small) risk of annihilation by, e.g., gamma-ray burst, and go about our lives.