When you generally respawn in game there is a Lore reason: your Ghost reanimates you, much the same way as they initally revived you. And there are lore reasons for most things in the game. When a fireteam "wipes" it is given the message "The Darkness Consumed You". Ie, no respawn you're dead. It would be reasonable to conclude therefore that any fireteam that survives a Darkness zone exists in a timeline where no mistakes were made and that each time a fireteam makes a mistake that is a dead end universe branch for them. In a particular branch of Multiverse theory, where every "decision" on the quantum level initiates a cascade of genuine new realities, this makes perfect sense. There has to be an observer for quantum probabilities to resolve into reality though, so only in the Universe where the Observer is successful will reality persist. But who is the Observer? The Guardian or The Darkness? The Darkness thinks that it is winning because it sees victory in the majority of the probabilities - but all we have to do is to Observe one clean path of victory of the Light and the Light wins by default. There cannot be 2 realities. The Darkness has to win ALL fights to make it's reality real. We only have to beat it once to beat it entirely. That's what the Stranger is looking for. That one thread of Victory.

Lore-wise when you die in a Darkness zone there is not enough Light for your Ghost to resurrect you - and subsequently you are dead: permanently.

Yep. In that probability branch, dead as you can be. I'm suggesting that we Players simply hop to a different probability branch where we make subtly different decisions and manage to survive.

I don't think so. There could be other timelines where the guardians don't fail, but I don't believe they move timelines. The Darkness nor the Light has the raw power to shift dimensional space.

To attach a lore description for certain outcomes like victory or failing is just part of the image. That does not extend to things like instance respawning. Midfight respawning yes, that one is clearly defined. Buy when you as the gamer fails, that's the end of it. You lost. So should the game just stop there? No it puts you back to give you another chance. Why? Because there is an intended outcome in mind. You play till you attain that outcome. This is not lore this is just video game mechanics. Like I said earlier, I like how he thinks outside the box, but there is such a thing as going too far. You shouldn't try to attach lore to places it doesn't exist, or belong for that mater.