alt Hacker NewsWell, I don't buy the "principled" part either, not at scale.
But it is organized, and there's not that much fundamental difference between corporations and criminal enterprises, not in the ways they are run. The details boil down to different trade-offs taken wrt. risk vs. reward related to staying on the good side of the law. A lot of the violence (particularly the "principled"-looking one) seems to stem from the fact that a criminal org needs to built its own layer of coordination and enforcement, since by definition it cannot rely on public services of law enforcement and the legal system.
There is no need to stay "on the good side of the law." They pay off cops. They pay off the judges.
If they can kill with impunity they can certainly do the same with drugs.
Large-scale crack cocaine gangs existed too with substantial levels of organization but they still sell crack.
They're mostly unintelligent thugs motivated by greed. And I think the "Why would they kill their own customers?" implies they think that far ahead. Which is probably true as well for most major corps. They'll take short term profit over quite literally anything.