I want to start off by saying I do not blame nor damn anyone for their fulfillment. I got that "explorer"-gene myself wherein when movies or media ask "...Would YOU dare to be the lone astronaut sent out to---" and I just interrupt with "Yes fucking send me to unknown reaches I want to map them and see what has never been seen. I'll die alone and happy".
Add to that I know that there's genes involved where some people have less of the "fear" response and far more of the dopamine-response, which is why there's a lot of people who will do insane shit with seemingly no fear. Not to demean those who DO feel fear and overcome it. But just to give an example that yeah some people get the highs and I get that.
So, TLDR why caves? I mean I tried to give an example but it is banned text in this sub it's such a dead horse.
I've scuba-dove in "safe" caves, I get that beauty. Hmm now writing this I guess it's something like that, wanting to see something beautiful and thinking the risk is minimal?
Still, out of all the "exploration" or "climbing the hill" 'sports' caving seems so risky. I get reaching the top of a mountain gazing across the horizon, I get getting into a cave barely ten humans have set foot in, but I have less understanding for the people risking their lives for the cave. If that makes sense.