You picked an example at the extreme end, so let me choose another example at the opposite end. Breaking into people's homes and taking their stuff is illegal. It would happen a lot more if there were no laws against it.
You've completely missed the point. I'll break it down.
When you break a law, it doesn't magically summon an LEO and judge to catch you in the act and give you the proper penalty, so words in a code is not a deterrent. The deterrent is knowing someone will hunt you down, getting thrown in jail, it's fines that hurt your bottom line.
Yes, our society places a premium on policing break ins very harshly. Police have huge budgets for street crime & judges have harsh penalties available to them. White collar crime, like financial crime or breaking what little privacy protections is on the books? Not so much... So, again, you can't just make a law. You also have to have groups empowered to enforce the law and dole out punishments heavy enough to act as a deterrent.
