The problem with this is that it is thinking in absolutes during a situation where people are often very willing to compromise their own beliefs just to be able to provide an answer.

In normal elections we see this with people who don't like any choice, but don't want to spoil their ballot. So they pick their next best favorite.

This means that if A is removed, people might pick B or C instead just because A isn't there.

People are tricky. Hard to pin down what's exactly going to happen every time. There are distinguishable patterns and such; but ultimately you can't rely on them as if they are infallible.