Is it immoral to do illegal drugs? So, I think you can play devil's advocate for so long, so here's my take.
Given that we prescribe in the great States, amphetamine or Ritalin to kids for ADHD, I find it highly dubious to say that pot should be illegal. Marijuana only became illegal because of the cotton and paper industry in the US. More people die yearly from aspirin than from marijuana. It's incredibly hard to overdose on marijuana if not impossible.
LSD-25 was created by the CIA through their MK-ULTRA program on assessing the possibility of creating Manchurian candidates or some really far out ideas like mind control. If you go deep enough into YouTube you can find testimonies by ordinary citizens about being test subjects for the MK-ULTRA program. Sounds wacky; but, it's true. After a psychedelic trip, there are irreversible changes that are elicited through epigenetic mechanisms. Core facets of personality are altered to some degree, such as openness, oneness, and appreciation of what one has. Microdosing LSD-25 is a hot fad nowadays. People from Silicon Valley are taking it under the assumption that it encourages creativity, productivity, and awareness.
Personally, I've tried many drugs and became addicted to some hard stuff like meth and 4F-MPH (analog of Ritalin; but, super potent and strong stuff). The military even assessed the possibility of amphetamine increasing the morale of soldiers during WWII. The results did not warrant further research on the topic, and the Nazis were quick to stop giving their soldiers Pervitin after seeing the emergence of psychosis after some nights of not having any sleep for the poor soldier. They even thought that sleep could be done away with entirely, which nowadays would seem absurd. Yet, we have created ergogenics like Modafinil for airline pilots or for those suffering from narcolepsy.
MAPS (Multidisciplinary Association for Psychedelic Studies) is perhaps the only association investigating how psychedelics can be used to treat anxiety, phobias, OCD, alcoholism, addictions, depression, and some long list of other ailments of the mind. Ayahuasca is probably going to make a comeback to treat stuff like addictions and phobias. Ketamine is already being sold as a nasal spray in the States as of recent.
There's a lot to learn from these compound that scientists are researching and hoping with anticipation get government funding for.
I have always resented the "drugs are bad" mantra that goes around in schools. Deterrence just doesn't work against these drugs. It hasn't worked for alcohol during the prohibition period, and won't nowadays. I've heard that if you remove the "Whoo" factor or the taboo from such drugs, people would go on just fine with them.
Anyway, my two pennies.