Nut is cracked by herb.

[Aemilius Paulus]

No, actually, LSD is the least harmful of them all and the vast majority of scientists, especially chemists protested its classification as a narcotic because it is not quite so. LSD has no noted harmful, long term physical side-effects. Purely psychological. Unlike cannabis, which has a load of possible outcomes, although all are generally mild. Now, I have no idea why he approved of MDMA though... Ecstasy is a dangerous drug that one can grow addicted to and that can result in a deadly overdose, although it does not compare with "hard" drugs.

While at the same time the vast majority of addiction to marijuana is merely psychological, not physical and the possibility of overdose is nearly impossible due to the vast amount one has to consume. Overdosing on water is much easier than with cannabis. And no one has even observed such occurrence as an overdose of LSD.