Really? Prohibition of fentanyl is most costly than the drug itself? Not to be hyperbolic, but that suggests what you’re saying isn’t true and it’s really a matter of degree. Should marijuana be encouraged for use in kindergartens? Of course not, clearly some restrictions make sense.
I don’t care if people use some drugs. I have some edibles of my own in my fridge right now. What I care about is normalizing vices and pretending like it’s just a matter of individual preference when it obviously affects the rest of society at large (and makes life worse).