Which is exactly the problem with this whole discussion. On the far side, you hear that it's heroin! It's fentanyl! It's alcohol! Facebook groups are the modern opium den! But when actually challenged, it's oh no no, that's a metaphor, it's metaphorical fentanyl, not real fentanyl. People on Instagram are metaphorically injecting metaphorical drugs into their metaphorical veins.

It's a poor basis for policy and thought. I would wager 20 francs that none of these people have ever seen a heroin OD. The whole discussion centers around a maximally impactful comparison but the middle of the comparison is hollow.