The worst case for me is, that after an accident all insurances were worthless, because none would pay anything (That's last not least the reason why I am an insured member of Alpenverein AND paid in the Solidarit?tsfond of the German VdhK which is in fact a pot with money for accidents with remaining, uncovered costs for the cavers AND are member of an Austrian caving club)
The worst case for all cavers would be, if they would nowhere get any (or affordable) insurance which expliciteley
includes or explicitely
not excludes caving.
Concerning Deutscher Alpenverein (Insurance is Elvia, an Allianz daughter): If they really learn what caving is, they could if they want, exclude it in their insurance conditions. Currently, "expeditions" are excluded, but nothing special about caving at all. If I fall tomorrow in a cave, and it was nothing they could sort out as "expedition", they would surely pay as if it was an "normal" mountaineering accident, and, surely depending on the amount, they would later think about excluding caving within their conditions. As the insurance from the Austrian V?H is also at Allianz (Austrian branch), I'm quite sure there are enough people at Allianz who know exactly what caving is.
Regards
Matthias
PS.: Concerning
Germany, maybe interesting, cave rescue in Bavaria is meanwhile an official part of official alpine rescue (Bayerische Bergwacht, belongs to Red Cross) and thus, if you are injured or need any other medical help, not just stuck or lost,
and if you are as german person insured in the official, statuatory health insurance, all rescue costs including transport to the next suitable hospital with any amount of rescue staff, divers etc. would be paid from the insurance with a "flat rate" which was negotiated between the Bergwacht and the insurances.
If you are in other states in Germany, there are other options. In Baden-W?rttemberg are two more or less "official" cave rescue organisations (H?hlenrettung Baden-W?rttemberg and Malteser H?hlenrettung) which work together with the local caving clubs and the official rescue but will charge the rescued persons separately (but mostly modest prices). In some other states exists no official cave rescue, and thus, you (or your insurance) would pay for the normal rescue on surface as usual, and if you are pulled out by firefighters, this part would be mostly free, and also if you are pulled out by any (mostly professionally working, but unofficial) cave rescue from local caving clubs, this would be also often free as they aren't allowed to charge anything. They would surely be happy with a donation, if you were happy with their rescue work. :
PPS: Im not a lawyer and no insurance guy. Thus, don't nail me down if something I wrote is wrong...