Sure they are. But the difference is thier ability to control markets. Its limited because they are the middleman. They aren't growing poppy, cocoa ect. They are buyers. They pay a higher price for the product which limits thier ability to resell and gain control.
Do they traffic drugs? Yes. But not on the scale you'd expect from an international organization.
They are too wrapped up in using thier product and killing each other reach that level. They used to be a major force in the meth trade. The hells angels kinda got that whole market going in the U.S.
They still run lots of meth, but once cooking it here became difficult they lost the market and now they buy it from mexico.
Nothing screams poor craftsmanship like wrinkles in your duct tape
The drug users in the US control the market. The drug growers overseas can only supply what the market demands. The bikers control the trafficking.
Not sure where you got that intel that they use most of it themselves. The volume they deal in would kill every biker in the country.