Doing this illegal act is hard so enforcement is not difficult. Stealing becomes easy.
Enforcement is no longer easy.
Therefore stealing things this new and easy way should be legal since people will do it anyway. Now, you are arguing that since enforcement is no longer easy that the law should not be enforced and that it should be OK for people to break the law. In other words, we should make it illegal to do bad things only if they are hard to do. You are, in effect, saying that society should not create or enforce laws unless the crime is so difficult that people can't commit them in the first place. Society decides that killing someone is bad and makes it illegal.