How can a publication like High Times be okay?

don’t get me wrong: I love the mag!!, but how can a magazine that tells you how to use and grow an illegal substance be legal and not prosecuted under the law? What if someone had a publication that was about how to rob banks? Would that publication be okay with the authorities? Maybe this is a stupid question, but I am interested in everyone’s take on this – especially the lawyers and law peeps!! Thanks