Unfortunately, I have had occassion to put myself at risk to save another diver's life. Fortunately, the diver's life was saved and I was fine. But I can assure you if I should die or get hurt trying to save someone who shouldn't have been diving in the first place I'm gonna be really pissed.
At a minimum it would seem to be appropriate to let me know that - at least when it comes to diving - you have less regard for your life than I do. I could then make an informed decision about whether I'm gonna risk my life to save your's. (Don't worry, I'll still jump off the boat. But that's MY decision, not your's.)
I agree completely with you on this point.