How can you not wear a helmet if you are cycling in a city?

If you don't do that, you are a complete moron who doesn't care about their own life.
Have fun when a car hits you and you fall to the ground with such force that your brains end up on the concrete, or you even hit a lamp post with your head and you are brain damaged for life, which could be avoided by wearing a damn helmet

People, PLEASE wear helmets, it can save your life.