Several years ago I was taking an on site avalanche course with a number of others who hiked, skied or snowmobiled the backcountry in winter. The purpose of the course was to help us identify avalanche conditions, prepare for rescue if necessary and generally travel safely in the west coast mountains. During a break one of the participants looked at us and said "you know if you won't admit that this sport can kill you, you shouldn't be out here". She was right and although scuba diving is inherently safe, the sentiment still applies.
I remember digging into snowbanks when I was a ski patroller on Mt. Hood to get an idea about avalanche conditions. The problem we were told is that wherever we dig, it could be completely different (and more hazardous) in other places. While conditions when diving typically don't change as dramatically, they can vary.
Spot on comment. I'm going to use that.