The reason for that is that you've been serving a hard drug to a customer. Don't do that if you cannot bear the responsibility (liability). In order to bear the liability, the price has to go up, including perhaps a safe escort home of the drug user, but of course that would be too expensive/socialist/authoritarian (blimey they want us to take responsible action regarding our customers! I knew a club here for young people where it was very normal to have them taxi'd home. Son, wanna go out? The taxi is part of the price), and lead to 'off the record' drug usage. Which is how we ended up in opioid crisis.

If alcohol would only be invented today, there's no chance it would be legal in the current umbrella of drugs. And, for good reason: it is too addictive, too harmful for self and their environment. Compare with the various empathogens or harmfulness of psychedelic drugs. These cause, normalized, far less damage to both user and their environment.

I abstain from drinking (I am sensitive to addiction which is how I ended up to that conclusion), and this weekend I had a tiramisu (it was on sale, wife bought it). Did I notice that? Oh hell, yes. Would you serve a child tiramisu? No, we should not.