Eternal life doesn’t necessarily mean being impervious to harm. If you live indeterminably because your flesh brain was preserved or there’s a digital copy of you on a hard drive, a simple drop on the floor could terminate your existence.
And if we’re talking about fiction, there’s no obligation to make those lives unbearably immortal either.
> Our flesh is indestructible. Our lives are never ending. But not even in the dumb vampire way where after a while you hate it and you can’t die. We can die whenever we want. We just don’t have to.
Catholic theology actually justifies the belief in Hell by arguing that an eternity of suffering in Hell is a blessing, because it admits the one benefit of existence itself, while total annihilation has no redeeming factors whatsoever.