I disagree. It's great that you take your civic duty seriously, but that doesn't excuse the tens of millions who do not. Even in purple states where voting matters enormously (FL, NC, OH, etc.), it hovers around 65%. There aren't 35% of voters who lead such fantastically exciting or dreadfully difficult lives that they couldn't possibly find the time to vote, so where are they?
Low turnout elections face an inherent legitimacy problem, which, ironically, leads to an even more disengaged voting base. Then it becomes a race to who can anger their voters the most to get them to show up, driving away centrists. It encourages moves to get to 50.01% instead of focusing on an inclusive long term vision. You get the buzzer beater thrill of barely edging your opponent, but that's it.
The US has an incredibly strong patriotic sentiment (sometimes wholly misguided, but that's a discussion for another day). Why isn't this translating to 90% civic engagement?