Nice libertarian principle in theory, but it's not the practical reality.

Big Tobacco has been demonized for decades for pushing a dangerous, addictive product, and worse, marketing at least obliquely to kids. If tobacco didn't have deep, ancient cultural roots in society it would have been banned years ago (like they tried with booze).

But then some people turn around and defend and idolize the noble central/south american peasants for simply filling a demand north of the border.

Reality is that what the narcos peddle is significantly more addictive and dangerous than tobacco, and they actively and deliberately strive for market penetration with people who haven't done drugs (including kids/schools).

The addiction isn't an incidental side effect, it's a fundamental feature of the product (for the seller).