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It is incredibly dangerous in comparison (as a scuba diver). These courses generally have a requirement of being a very competent diver (hundreds of logged dives, for example) and they just won't pass you if you don't know what you're doing. Cave divers take things very seriously.

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I have a "full cave" card and about 100 post-certification cave dives. I have been actively ocean diving and even doing wreck diving, which are overhead environments, but I haven't been in a cave in 10 years. I still likely take a refresher/checkout course to polish my skills with an instructor just to be safe if I wanted to cave dive again. Your instincts are what can kill you in a cave diving.

But it's worth it, you visit places that few people have seen with their own eye and it's safe if you follow the rules.

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