Wtf?
You obviously missed the point. No, if the average is 77 or so for a man, that factors in people who may have died at 27 in a war, or 36 in a car accident, or 45 of cancer. If you are already over 70 it doesn't mean you are as likely to dje at 77. You already are not one of the people pulling down the average. It's common sense.
Why is it I always have to explain math to you?