One might demur by saying ‘it is illegal’, now they cannot say that. —my take. As in: Come on girl, smoke this joint! No, it is illegal. But this is CA - it is legal now! cue creepy music.
Which doesn't add up to "coercion" as the article claims.
Another thing they won't say if it's legal is, "I can't tell the police my pimp beat me because then they'll know I'm breaking the prostitution laws." The idea that legalization is an aid to criminals is a farce ... it doesn't withstand 30 seconds of serious thought.