In the case of teleportation, I think teleportation-phobic people are mostly making an implicit error of the form “mistakenly modeling situations as though you are a Cartesian Ghost who is observing experiences from outside the universe”, not making a mistake about what their preferences are per se.
Why not both? I can imagine that someone would be persuaded to accept teleportation/uploading if they stopped believing in physical Cartesian Ghost. But it’s possible that if you remind them that continuity of experience, like table, is just a description of physical situation and not divinely blessed necessary value, that would be enough to tip the balance toward them valuing carbon or whatever. It’s bad to be wrong about Cartesian Ghosts, but it’s also bad to think that you don’t have a choice about how you value experience.
Isn’t the frequency of amplitude-patterns changes depending on what you do? So an agent can care about that instead of point-states.