I generally feel that anyone not afraid of mortality has some extreme denial or depression going on (more often the former).
An uncle recently deceased in from cardiac arrest in his bed at his home during his sleep at 83. He was fishing the day before.... That's an ideal death IMHO. If you knew that you would have a similar death, would you be afraid ? I would not.
The issue isn't the "dying", it's the endless trillions of years of experience we are deprived of in death.
Noted in your uniquely written contract at birth is the ultimate outcome at somewhere around three score and ten. Get the most out of the experience you are given.