Why do we win every boss fight in games and not die? (Lore wise), look at Destiny for example. Guardian kills Atheon, Crota, Oryx, Aksis. Seems like they are invincible, though the ghosts can revive them. Why not kill the ghosts? Well D2 is sorta going that path, but guess what, Guardian figures out how to kill Ghaul, the end. Also, why would you even want to poke the Guardian if he took down a God, Oryx? Why didn't Oryx just straight up kill is with that clap when we spawn? Why didn't he use the Dreadnought to destroy Earth and the Traveler? Why didn't the Cabal send more reinforcements once they set those bombs, that would have been a instant solar system wipe. Why doesn't any boss just kill us as soon as they see us in any game? Games don't make sense.