Bruce Willis has fooled you. As a matter of fact, it is about as funny as cancer, or mass murder. Not to realise that some things are dangerous without having it painfully proven to you is dumb. Hydrogen bombs have never killed anyone. But we can imagine the consequences of a war in which they are used in anger.
Statistics can be misleading.
Take air crashes. I'm a member of the Qantas frequent flyer club, an airline that has never had an accident. Circumstances can change quickly. Until recently Concorde was regarded as a paragon of air safety. Two decades ago virtually everyone, weather forecasters included, thought that hurricanes never hit England.