The cocaine trade predates Maduro and has never been stopped by anyone despite the US spending trillions trying to do so.
Because of people like Maduro, who perpetuate it.
The only reason there is a cocaine trade is because the US is filled with customers wanting it.
Because it's cheap and easy to get. Because of people like Maduro.
There is no trade without someone willing to buy it
And someone willing to risk their life to get it here. No one's going to take that job for 500 bucks anymore.