Rationally, you are right that voting as an individual doesn't matter (I linked the Paradox of Voting in another comment for this very reason). I still do vote,

Rationally, you are right that voting as an individual doesn't matter (I linked the Paradox of Voting in another comment for this very reason). I still do vote, though, because there are non-rational reasons I think voting is important. You are absolutely right, though, that pure game theory says voting is not important, and I believe that is why voting is not how we make changes to our society (at least not directly). It takes organizing.