Not OP, but wanting eternal life without leaving a legacy just sounds like someone trying to be a god and is very narcissistic behavior
Gods famously don't have legacies
A lot of parents are literally trying to live forever in some way by leaving a legacy.
Isn't wanting billions of other people to die infinitely more narcissistic than not wanting to die yourself?
Or they just enjoy life and want to keep living? What about it is 'trying to be a god'?