The reason you feel like that is partially due to being raised in a cult religion but primarily because we are born with the innate feeling of wanting to live forever. We are not like animals that have very limited thinking capacity when compared to humans. The fact that we are self-aware (consciously aware of existence) and value our life and wish never to die, at least not normally, is indicative that we we're never meant to live and die so young. How can a tree that is an inanimate object live longer than a human being? How can some animals who have nowhere near the creative capacity of humans outlive us sometimes by decades?
You are going to get a lot of people posting that we should just enjoy life which we should, but not look forward to dying. A lot of members are so put off by the WT that they have gone off the cliff and would rather just enjoy the 80 year life span and then die when their mind is screaming NO!!! I'm not ready to die!! I want to live!! The exception would be if you are suffering from maladies and diseases but even then, many people fight to stay alive. You have to ask yourself why we wish to preserve our life when evolutionists are telling us it's normal to just check out at 80+ years.