Actually, when working through it, it looks like pre-nap self was wrong! (Okay no distancing, I was wrong :P). I still wrote up a big comment though, you'll see what I neglected before.

Short counterargument - if rather than a mild reward, the simulated copies got a horrible punishment, would that change whether you picked Sim when you might be one of those copies? Then because of how utility works the simulated copies always matter.