The birth of a right of publicity claim

So, Monument to Pro-Life: The Birth of Sean Preston comes with a press release suggesting the sculpture honors Britney Spears for breeding at such a young age. Read carefully, the release doesn't say that Manhattan Right to Life endorses the sculpture, but it sure sounds like it at first. So there are potential right of publicity, trademark/false endorsement, and copyright claims (depending on what it means for the dedication to "incorporate" Right to Life materials).

How come artists never engage in patent infringement or expose trade secrets as a means of expression?