What's your point? That the majority of folks over the age of 100 have health problems? We all know this and understand that the chances of us even reaching 100 are pretty slim. OTOH, shouldn't decisions of this nature be based on ability rather than age? I think it's doubtful that I'll ever meet a working DM who is age 100 or more, but I wouldn't discount them solely because of a number. To do so would be bigoted.
Apparently I have offended you, and I apologize.In my original post I was just making light of the situation. I agree that your ability to dive is more important than your age. If you know someone over the age of 100, and they still dive, then I salute them.