We humans are adversarial beings, easily riled by us-versus-them conflict. (Even Canadians!) Democratic politics is a wonderful way to peacefully channel social antagonism into ritual symbolic warfare. High voter turnout is as likely to reflect angry social division as it is to augur the reign of Kumbaya social cohesion.
Indeed, lower levels of turnout may suggest that voters actually trust each other more—that fewer feel an urgent need to vote defensively, to guard against competing interests or ideologies. Is it really all that bad if a broad swath of voters, relatively happy with the status quo, sit it out from a decided lack of pique?