Fear is a natural emotion, one that when present in healthy amounts can function to keep us safe and well. Without any sense of fear, we might causally stroll across the street in front of traffic or take other such risks that might have severe consequences. Or an over abundance of fear can paralyze us into inaction or overreacting again causing undesirable consequences.
Maybe there is a middle of the road amount of fear, that we can recognize as important data to pay attention to so we can make wise choices. A healthy level of fear-emotion can inform us of things to consider as we choose how to respond to that particular situation.