The most compelling reason to argue against these kinds of laws is to think of their full consequences if suddenly illegal transactions were virtuous, as they have been in the past when totalitarian regimes have gained power. The present day doesn’t put a high value on freedom to transact in the west, because most illegal transactions in the west are for things many would consider criminal or immoral. But if times change (as they do in history) then not securing the freedom to transact and a vibrant economy rooted in this freedom will be come to seen as a grave error imo.