Don't hold your breath.
I'd prefer we pay some Afganis to grow opium, wheat, fruits, nuts; wool, mutton, sheepskins, lambskins" ect.
But there's no sane reason for the US to buy up the available crop of opium worldwide until the market doesn't exist. That's total nonsense.
The reasons to do it have already been mentioned. If you think they are insane, fair enough.