Nobody is saying you have to live your life that way. Some do. Some also take reasonable precautions. There is nothing wrong with learning CPR to save someone, there is nothing wrong with having smoke detectors or fire extinguishers in your home. There is nothing wrong with wearing a seatbelt. There is nothing wrong with putting a fence around your pool to keep young children from falling in. There is nothing wrong with wearing life vest on a boat. There is nothing wrong with learning self defense if you have to defend yourself. People take precautions for events that may happen. In my area recently a real estate agent was murdered in a home they were showing by some random person. Would it be prudent for real estate agents to carry some form of protection? Sure, that doesnt make them paranoid. Everyone heard about the college student murdered while out for a run, does that mean it is unreasonable for young pretty girls to bring some sort of protection?