Bingo. It's incredibly condescending and straight-up ignorant to caricature non-voters as naively unaware of the goings on.
Personally I like to make it as clear as possible that I did not endorse the outcome of the election. And seeing how the press reports on third parties gives little option there.
But as I said my biggest concern is that having voted seems to warp people's minds. If they voted for the winner, they rationalize what's being done as in line with corresponding to what they wished for. And if they voted for the loser they get to tell themselves they fought the good fight, but that the other majority is responsible for the results.
I actually think the second largest factor to winning elections is getting wary voters to show up and vote against the incumbent party (with the first being the tendency to go with what one knows).
IMHO, "centrist" is the wrong way to look at it, but of course I'm imparting my own views here. Primarily people just want to be left alone, but they can be whipped into a fervor against an "other". So both parties' basic marketing spiel is freedom for their grass roots constituents' general pain points. But obviously what's ruining your freedom is that other group over there. So really we've got to stop them, and maybe even give them some of their own medicine.
Then when an election is won and it's time for action, of course the profitable ideas have legs - say, undermining the freedoms of the "other" in a way justifiable to the winners. Meanwhile rolling back the older policies would cut into someone's profit, is thus politically unpalatable, and therefore nothing gets done.