Well, since it is required where you live, you are breaking the law.
- If you get caught breaking the law, the fines are substantial.
- If you are at fault in a car accident and injure someone else, they will sue you for everything you are worth.
- If you cause a car accident and your car is damaged, you will have to pay for the repairs yourself.
- You are being a bad citizen. If you injure someone else, you will be unlikely to fairly compensate them for the harm you caused them. Imagine you cause a brain injury and the person needs care for the rest of their life, and you leave them with nothing.