Ahh, but you can't know if it's the actual you that wakes up or a perfect copy of you.

If a copy is indistinguishable enough from the original, you have to treat that copy as you would treat you.

Imagine the following experiment, you are on a room seeing 5 (or 20, or 100) live streams of as many perfect copies. You are informed that a livestream of yourself is being presented to the rest.

You are given the same questions and you all answer in the same way. Now they tell that out of all of you, only one is the original and that you can vote to proceed with some pretty terrible physical punishment to the simulations. Which way are you voting?