the reality is that the drugs causing problems at the bottom of american (and canadian) society don't need to be imported from anywhere, because they're made out of chemicals in a lab.

the premise of "drug trafficking" is a 20th century concept. it's not how drugs are manufactured or distributed anymore, and there is no better idea in terms of going after drug traffickers. the drug trafficking that still exists would be mostly for cocaine, and to a lesser extent for marijuana. 

you'd be an utter moron to try to traffic fentanyl or meth over a border when you can just make it in a lab instead.