Well … the cartels would be stripped of a profitable source of revenue. I always figure they’re smart enough to allocate resource to the activities that generate the most profit per unit (hour, individual, gram, whatever) - and by taking away drug cash (high margins in the overall system, to compensate for the risk load, which is not carried by the ultimate big money makers) we’d push them down the hierarchy of earnings.
So the criminal thing would all look a bit more workaday, a bit less flash beemer. It’s gotta help.