The Wiki article is something I wish I had time to edit. Yes, there was an attempt to ensure that the right sort of thing be printed, but it was also about making sure that no one else could print certain documents. You'd license a bible text to be able to regulate that it's the correct type of bible being printed, yes. You'd then see who else was printing bibles and shut them down. Okay, that's all correct, but there's more to its foundation than that. For example, in the UK, one individual had the sole right to profit off the last testaments of people to be hanged in Newgate Prison. In the 17th C, Parliament gave this power was to a preacher who in turn designated a specific printer. That power is what allowed the preacher (and the printer) to profit: no one could (legally) copy it. Regulating printers was the only way to ensure profit for an author and it was an attempt to guarantee conformity.