[SomeStupidPoint]

> Say you care very much but don't know what's best? Does your vote not matter, now?

Yes, your vote doesn't matter in that case, because you have no information to convey to the system: you have no preference. Only votes which are conveying a preference about how the situation should be handled are useful. There's no reason to distinguish between "I care, but don't have anything to say about the topic" and "I don't care" if you're not even willing to vote based on which candidate talks about the issues you care about, at least as far as elections go.

Write a letter or something.

Ed: In a slightly less snarky sense, your vote really doesn't matter at that point. The point you should participate in the process, if you feel candidates aren't addressing your issues, is way before that. It just requires actual amounts of time and effort to shift platforms, though, and participation beyond checking a box every year/few years.