To be fair, when it comes to being valuable, criminals consider violence like armed robbery and murder valuable because it helps them achieve their goals, and yet we agree that those things are not a benefit to society and created laws to discourage and punish such acts.
Certainly the criminals doesn't agree don't you think ? One side just happen to have more power to forced the other side to comply. There is no agreement. The more powerfull one get to decide what the law is.
