The same argument would probably be made to combat the illegal drug trade. Not sure we want to go there
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.
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.