"Why do so few people in the United States exercise their right and privilege to vote?"
The more interesting question from an economics point of view is why does anyone bother voting. Since races almost never come down to one vote, your vote almost certainly doesn't matter. Nevermind the fact that more people voted for democrats for the senate and the presidency and still lost both. The latest theory I've heard for why people vote is that being seen as a team player has social value. https://eml.berkele…
But in my area at least, votes do occasionally come down to a couple of dozen votes. I'm not in the US though and we don't really have gerrymandering, nor do we have anyone trying to disenfranchise on racial or class grounds - (in fact, here voting is compulsory!).