You are right, in a society without rules, there is no sin but once there is a rule, you must adhere to it, otherwise, you might be punished. So, rules were created due to the past experience of people and for it not to repeat itself again, they make such rules for the safety of everyone.
Nothing but the truth, sometimes, some people are always looking for easy way to do things, which might land them into trouble at the end, nah Naija we dey...