You'd have a point, if non-votes were counted. Unfortunately, if none of the candidates agree with you on a certain issue, sometimes it's better to vote for the lesser of two evils. I think often the act of participating in voting is stressed a lot. If you can find a candidate who agrees with you on a lot of things, sometimes that's your best bet. Then again, sometimes things said in the campaign are forgotten during their term. It may be for the better if non-votes got some weight, it's like saying all of these candidates disgust me why would I vote for one of these. Or it's just being complacent, in which case your non-vote could count as approval, like for the incumbent or his party. It's pretty easy getting to the voting booth where I live, but with those long lines in lots of parts of the country, those people's non-votes due to inconvenience would have counted too.