Take a step back and look at the information flows of democracy. One or two ballots per year, with a handful of questions on them. For the national races, that

Take a step back and look at the information flows of democracy. One or two ballots per year, with a handful of questions on them. For the national races, that is maybe 3 bits/year on average? Compare with the constant stream of ads, speeches, news articles, etc. Then at the higher level it's not like adding repeated answers to the same question preserves much information (cf Central Limit Theorem). So really the information flows to the voters are the more significant part of this setup, with the act of choosing serving as a commitment to make you think you wanted everything you voted for.