Back to the Middle Ages, Part 2

Last Wednesday I commented on the Pope's granting of new indulgences, which harken back to the Middle Ages.  A week later I find myself surprised again, this time by Pope Francis' urging that drugs not be legalized, as he doesn't think that legalization will correct the problem.  Yet, in the same speech he said, "There are so many situations in Brazil, and throughout the world, that require attention, care and love, like the fight against chemical dependency." and "How many 'dealers of death' there are that follow the logic of power and money at any cost. The scourge of drug-trafficking, that favors violence and sows the seeds of suffering and death, requires of society as a whole an act of courage."  Wouldn't legalization of some drugs minimize his concerns?