So just because someone believes everything Jesus ever said including the talk of eternal life...they are just supposed to automatically start to purposely "deteriorate & vegitate" so they can get there quicker?
I'm saying Christians should WANT to get to heaven as fast as possible, but instead they treat death like the end as well. Exercising everyday is artificially prolonging your life, and I thought god could kill you at any time, so the excuse that you're "helping him out" by keeping yourself healthy doesn't fly. Sure you can try to make excuses about doing god's will, but that is really just a cover for being scared to die. God doesn't need you to live until 80 to serve a purpose. Most people, in fact, WON'T make a significant difference to humanity and will be quickly forgotten about when dead.
Christians do look forward to spending eternity with God, but it doesn't mean we don't want to live on earth for whatever lifespan we have. There's wonderful things to enjoy here on earth (family, friends, get-togethers, chuch, movies, shopping, trips, etc.) and in the meantime we fellowship with other believers, as well as nonbelievers, etc., and offer to share our Lord with others, in the hopes that they, too, will spend eternity with God. Yet, I realize there are others who are unhappy or hurting and don't wish to remain here for the rest of their lives. That is one of the harsh realities of life that is hard to deal with, not to mention extremely sad.
As for being afraid to die, that's an unknown for everyone. Some people don't care either way about death. Others are afraid of the pain of diseases, sickness, etc, and others are just plain scared to be alone when they are dying. But, there is a major difference between believers and nonbelievers, and that is no matter what we feel when we die, we WILL spend eternity with Him in Heaven. Fear is a human emotion that is normal.
One other thing I disagree with you on, is that God has a purpose for anyone, whether or not they believe, and whatever age they may be, from the loss of a baby, a newborn, all the way through our elderly years for those who are able to live that long. I know several sr. citizens who have led people to the Lord, brought together family members who were estranged, made a little child happy, shared tears with another sr. citizen friend, etc. There is no limit as to what God can do.