The conservative voters I know all stand for one thing: stubbornness. They make a decision to do something, they do it until they die, and they take great pride in doing so.
It's essentially vikings if, instead of needing to die in battle to get to Valhalla, you needed to die of an easily-preventable disease because you never got that weird lump checked out, because if you'd admitted you had a problem you'd be weak, which is worse than death.