Surely the demand for medically useless and deadly products would fall pretty fast.
And how many people get sucked into the party kid bullshit, because they want to fit in and impress people. AKA: doing drugs to seem edgy.
Drug production and use generally causes little damage, the same does not apply for this insane "natural medicine" practiced by some people.
Illegal drug production causes immense damage. Look at Columbia circa 1990 for an extreme example.
As for condemnation, that is entirely subjective. Poisoning the well and accepting random damage to save animals is not imo a morally just move.
2. The main end result is that you're essentially sentencing people to death for this crime.
The problem is that you just end up killing or making sick the end of the supply chain, the end user. Disregarding the moral issues of poisoning people, it costs a lot of money, because then you have to treat these sick people. Secondly, the worst criminals (assuming that using drugs or alcohol is a crime), the suppliers and dealers, don't actually get affected by this.
People will try and get their fix regardless. People are buying fentanyl and killing themselves wholesale, and the people dealing it out don't give a fuck that they're killing their customers.