Earlier quoted context omitted.
Find an election for a significant, contested office that gets no votes, and we can worry about this parable.
It doesn't have to be an election with no votes. Just an election whose outcome could be changed by the votes of people who believe their votes don't matter. An election with 5500 votes for A and 5000 for B could be turned with 1000 more votes for B.
Why would those 1000 votes all be for B? They could be for A. They could be evenly split between them. Most likely, they'd be proportionally split similarly to the original vote.
You're looking at partisans' rhetoric used to motivate their supporters and mistaking it for logic.