The US/CIA didn’t stop this. The Taliban did.
Heck, I was just thinking that the CIA is probably very upset at this new development. There goes another big source of funding. The Mexico cartels are going to have to step up their trafficking to make up for the shortfall.
So the Taliban made a deal with the RED CHINKS, they stop opium production but get 10% of the FENTANYL PROFITS!
Probably someone told the taliban that if they just stopped the opium trade —they could make a 1000 times more extracting afghantistan’s natural resources.