To Dip or Not To Dip?

I'm confused about dipping frags in an iodine dip.

I know one reason is to kill off pests and hitchikers, but if I am only fragging corals from my tank why bother if my tank is clean?

On the other hand, is it because the act of cutting the coral creates wounds which need to be dressed just like you might clean a cut on your hand?

Thanks