I'm not entirely sure if you yourself understand the context or real meaning of that phrase, but for others at least, it was NOT meant to highlight that Parliament has a burning desire or real ability to legislate outside of its jurisdiction!

Just that it has the legal authority to create any such law, and that the legitimacy of a law is not dependent on its moral content. It's merely a paraphrasing/summary of H.L.A. Hart's legal positivism.