At 69, notwithstanding the subject matter of this thread, I have to say I am more than a little offended that a diver's age is immediately identified as "a likely cause."
Age, while potentially one of an inventory of factors, is not necessarily always either the primary cause, or even a contributory cause.
I think you're being serious, but it's hard to tell for sure. Life insurance companies would disagree with you; they seem to think that, in general, the risk of dying increases as a person ages. And they bet their money on that opinion.
No need to be offended... take it as a challenge. Aim to be the exception by still being an active diver at 100. (My mom is 69 and an active diver, and has no intention of stopping anytime soon. The oldest diver I've met was an 85 year old WWII Marine veteran. He needed a little assistance with his gear... but only a little.)