That's because it's dangerous. Even good old weed can provoke psychosis, never mind LSD and mushrooms. Case in point: https://www.reuters.com/business/aerospace-defense/off-duty-...
LSD, ketamine, and other chemicals seem to be working for some people. But it doesn't mean that they're completely _safe_.
Nobody should ever be getting behind the wheel of a car, let alone the cockpit of a plane, if they have not slept in 40+ hours.
There are lots of things that went wrong in that story, at multiple points. Using it to conclude that drugs are categorically unsafe, and therefore should be criminalized, is the wrong takeaway.
> Nobody should ever be getting behind the wheel of a car, let alone the cockpit of a plane, if they have not slept in 40+ hours.
Yeah, just imagine if he actually had a doctor checking on him after he used psychedelics.
And because any sign of depression or mental illness is career-ending from a pilot, the FAA and airlines' policy turned something that might have been treatable into something much worse.
This situation reads to me like a last ditch effort to fix the depression before attempting suicide. The tragedy here is that this will only lead to stricter regulations, rather than the mental health reform this industry needs.