That's one way of looking at it. Just because someone sues for copyright violation doesn't mean any has been committed. Tons of "screenplay writers" have come out of the woodwork after a particular show or movie has gotten a lot of press or boxoffice profits, waving some script around, claiming that a copyright has been violated. While I am sure some of them are valid complaints, not all of them are. You are making a pretty broad assumption that ALL cases of supposed copyright infringement are of course, true.