Excerpting my point out of context like this isn't helpful. I'm responding to the Christian's glib notion that he doesn't understand why atheists worry about dying.

There's no value at all in fretting over death once it's inevitable. There is great value in fretting over possible deaths we can avoid. And regardless, death for atheists is the loss of everything, and loss aversion is a well-studied component of human psychology, so it should be unsurprising even to a Christian that atheists are not particularly jolly about death.