The problem is that "changing the law" usually changes the legality of more than just the specific situation at hand. So a law banning "my tarot cards tell me

The problem is that "changing the law" usually changes the legality of more than just the specific situation at hand. So a law banning "my tarot cards tell me person X is a murderer" may also ban "I've carefully reviewed all the evidence, and I think person X is a murderer" where this is a reasonable accusation. And we can go from murder to "rape" or "abuse" etc. You need to be very careful with this kind of stuff; in this particular case, yeah, I agree that it probably should be illegal. But at the same time: what else would this also make illegal, and wouldn't the cure be worse than the disease?