If I am right and the only effective way to defeat Trump will be to vote in person as he will have destroyed the USPS, then defeating Trump means that many people will die.
This is a terrible cost to pay to win an election, and it is a terrible choice for people to make, especially as the risk you take by voting in person is mostly a risk to other people. To defeat the person who cares only about himself people have to behave, for a moment, like people who care only about themselves.
But it's not a terrible cost to pay to win an election: it is a terrible cost to pay to avoid fascism, a civil war, or probably both. As the cost of winning a war against fascism, perhaps it is not such a high cost.