The habit of unfinishing tasks is useful when we want to jump from project to project, from one interest area to another without finishing them, without putting them into the world. We use it when we want to hide, when we avoid the vulnerability of touching someone and allowing to touch us back, when we selfishly ignore endless opportunities to change something for the better.
The habit of taking risks is useful when we want to connect with someone, to change the status quo, to fix that which is broken, to solve interesting problems, to raise the hand when we are unsure it's our turn. We use it when we are open to the feeling of being more human, more alive, when we realize that our daily mistakes aren't going to kills us, when the fear of not reaching our potential becomes greater than the fear of hearing this voice inside us - "see, I told you".
Both sides of curiosity are useful. It's in our power to choose which side we are going to embrace.