No, because those things are dangerous even when they work properly.
Which thereby distinguishes it from heroin, which poses fewer health risks than cigarettes as long as you continually inject the same amount. A more adequate analogy is buying sugar and getting rat poison instead. The person who sold you the rat poison is clearly culpable.

And even if Hoffman's heroin wasn't tainted with fentanyl (notably it only takes a couple drops of it to kill someone, because the stuff is at least 50 times more potent than heroin) that still doesn't mean he wasn't given an unusually potent dose, which is also possible.

Quin is absolutely 100% correct.