This is a bit of a straw man “do the ends justify the means” statement, with hints of anarchism read between the lines.
Western democracies haven’t really prioritized “war on drugs” (for lack of a better term) over the last probably 10ish years. Yeah there’s still funding and initiatives and some lip service.
Instead the focus has been largely infighting and major political factions fighting for political power in the next generation (“tech bros” political class for one)
So it’s no surprise state-sponsored (and just demand driven) drug trafficking into the US hasn’t received much action.
There is some hope though. With rare earth mineral access being a major national security priority, and many cartels controlling those areas in SA, the converging interests may produce some net positive. Background: https://youtu.be/q_n-74ifBZs?is=nw5g-mmPmKphGH2W
A war on drugs can only be won through heavy penalties on the users and the political classes refuse to come down hard on the users (themselves, their children) but rather come down hard on the dealers (poor people) or traffickers (foreigners). For this reason we never really had a war on drugs, just lip service towards one, hence a failure of government.