"you" have a chain of consciousness that is unique to your body. you destroy that body, and that chain of consciousness ends. re-assembling it elsewhere perfectly doesn't re-start that chain. it creates a new chain which from inside of its own perspective is consistent with the original chain. and it is. but the original chain has no further consciousness, as it was destroyed.

this isn't a "nobody really knows" situation so much as a "we know, but people refuse to accept what we know" situation. the semantics of what is "you" really don't matter when faced with reality.

Even if I agree with your interpretation, again, I'm not sure it matters. Perhaps my physical body dies and my brain becomes digitized and I "wake up" in a computer simulation, or perhaps in an artificial brain attached to a replacement body. Even if the new me has a new consciousness that isn't just a continuation of the old one, perhaps that's an outcome I'm ok with and welcome.