Most of those stories are just sour grapes. Dying has been the biggest fear for all of history for most people, and especially back then people were losing their family and friends at young ages.

You have to have some kind of belief in that situation that dying has a special purpose, or something happens after you die so that you’re rewarded.

It’s the same as the suffering of a medieval peasant, which they thought was so important. Nowadays we have eliminated that. Was it really giving them such an important meaning and rich life? No, they just thought it did to cope.

Besides, even if we cured aging it wouldn’t mean we’re trapped living forever, you’d be guaranteed to get killed some other way anyway.