If a drug dealer sells a drug that people enjoy and use to improve their quality of life, but a few people don't follow his advice and become addicted and die as a result, the drug dealer should go to prison for manslaughter?
No, I don't think they should, if what they're selling is what they claim to be selling. If it's laced with fentanyl or some other adulterant, that's another story (regardless of whether they were aware it was adulterated or not).
