Political junkies like myself often speak disparagingly of the undecideds. Don't you know? Haven't you thought about this? What are you, some kind of limpet who doesn't pay attention to these important events?
Well, they don't pay attention all year. They bring up children, coach Little League, run businesses, care for sick relatives, volunteer at charities. Which are the things that really make the world go on.
Ask the question another way: Is it possible to cram for an exam and still get a good grade?
Yes, it is true that such folk are more prone to being influenced by stray events and have less defense against untruth in campaigning. On the other hand, they don't hold the grudges that the wonks do, and don't get distracted by the political gamesmanship as much. If the undecideds didn't decide every election, it would be we fanatics who decided them. Maybe not such a good idea.