It is not as much the government but your fellow citizen that requires laws. Even a small percentage of them can make your life miserable. Laws are complicated

It is not as much the government but your fellow citizen that requires laws. Even a small percentage of them can make your life miserable. Laws are complicated because behaviors can be varied and circumstances complex: someone getting sick and peeing on your yard is different from someone going potty in your backyard every day ... etc long story short, societies need laws, people themselves don't fully understand the implications of the laws. People make the laws in the end, it is just inconvenient when most people have different opinions than one particular individual.