And certainly Adam Smith was trying to argue, well, Adam Smith and Edmund Burke were opposed to slavery, certainly, and were actually on the side of the American colonists at the same time.
But this argument, which first Anaxagoras and later Eudoxus and certain others used, is very easily upset; for it is not difficult to collect many insuperable objections to such a view.
Proponents against such a ban argue from an economic standpoint, highlighting advertising's critical role in the commercial ecosystem and its utility in educational contexts.