Doesn’t this assume that you’re a causal decision theorist?
No. (That is, to make taw incorrect you have to assume much more than that you are not a CDT agent. For example, making assumptions about what the other agents are, what they want and what they know about you.)
It seems to me that the same sort of decision-theoretic considerations that motivate me to vote at all in a large election would make it valid for me to vote my actual (relative) preference weighting in that election.
No. (That is, to make taw incorrect you have to assume much more than that you are not a CDT agent. For example, making assumptions about what the other agents are, what they want and what they know about you.)
It seems to me that the same sort of decision-theoretic considerations that motivate me to vote at all in a large election would make it valid for me to vote my actual (relative) preference weighting in that election.