Unfortunately, the US's winner-takes-all voting system makes it so that your (entirely reasonable and otherwise simply correct) mindset leads to what's called the Spoiler Effect, where a third party vote actually just ends up helping your least favorites. Because of this, the winner-takes-all system inevitably leads to two dominant parties, and being forced to vote for the shiniest of two turds. To fix this, we just need a different voting system. I'm partial to approval voting, but more likely that'd be ranked choice.
It was a joke.