A.) I have great life insurance... but it specifically excludes diving
B.) If I die while diving, my wife has been told to check with my trusted dive buddy to see if it was likely my fault - or no one's fault - and proceed accordingly
A) I have life insurance through my work. No one ever asked whether I am a dive instructor (though, perhaps, they know because that's part of my job description). Or a CCR diver. Or a cave diver. And I'm worried that if I ask they'll cancel it before they have a chance to avoid paying it.
B) My wife and I have had long conversations about this. The biggest agreement we've got is to make sure the world knows whatever it was we did to screw up, make a bad decision, etc. to help the accident analysis people further dive safety and, hopefully, help someone else not do the same dumb thing.