> Instead of pushing weed across the border, they’ve been heavily pushing Meth, Heroine, and Cocaine instead.

Citation needed. They've always pushed all of the above across the border, but you seem to be conflating two unrelated things: legalization in a few states with the opioid epidemic. What seems to be a far more likely driver of the opioid epidemic is the availability of cheap synthetic opiates like fentanyl that are highly concentrated, and therefore easier to smuggle.