Comment by AgentME

Imagine instead that at the end of a task, instead of deleting a copy, it and the original are merged again, such that the merged self is made up of both equally and has both their memories. (This is easier to imagine if both are software agents, or they're both biological, and the new merged body is made up of half of the materials of each.) In this case, I think it's apparent that the copy should have no fear of death and would be as willing as the original to work together.

Now imagine that because there's too many copies, there's too many unique memories, and before the merger, the copy has its memory wound back to how it was at the scan, not too different than if the copy got blackout drunk.

Now because the original already has those memories, there's no real difference between the original and the merged result. Is there any point in actually doing the merge then instead of dropping the copy? I'm convinced that actually bothering with that final merge step is just superstitious fluff.