To be prepared
You carry a cell phone, keep your AAA membership current, and keep a jack and spare tire in your trunk when you drive so you will be prepared for possible problems. Why not be prepared for an attack? Taekwondo will prepare you.
It is instinctive
All animals know how to defend themselves because their lives depend on it. Parents in the animal world do not release their offspring until they have developed self-defense skills effective enough for them to survive. Why do humans neglect their children in this respect? Taekwondo will teach your children how to defend themselves in today's world.
To be truly confident in yourself, you must be feel confident in your ability to protect yourself and your family. Taekwondo will give you this confidence.