If a law is on the books but completely unenforced, how is it relevant? Apple should obey every old illogical law from 200 years ago that's never enforced, and

If a law is on the books but completely unenforced, how is it relevant? Apple should obey every old illogical law from 200 years ago that's never enforced, and is actually harmful if followed? Many of the other details are relevant as well. Apple could obey the law and challenge it, like Google is doing with the Canadian law.