What lore do you ignore?

[Cleretic]

Also, why is our time the "real time" in a world with time travel?

Because we live there, obviously. In a story largely told within a specific time period, that time period defines what's dead and what's not. Sure, to Sokles in Elpis Amaurot isn't dead, but the story isn't about Sokles in Elpis.

It's also why G'raha's story doesn't function in the same ways as the necromancy stories: because to us, the person/places he's trying to save never died.