Because pot simulates spirituality if used in even small quantities which makes it hard if not impossible to reconcile with God. Smoking pot causes our brains to get it spiritual "fulfillment" in a pot high instead of seeking God.
Drunkness is of course not good, but consumption of alcohol in small quantities doesn't impair our ability to have a real spiritual existence.
Christianity figured this out which is why drug use was taboo in Christianity for so long. The word translated "witchcraft" or "sorcery' in the new testament is the greek word "pharmakeia" (transliterated). The use of drugs among pagans was thought to be mystical or helpful. In reality it was practitioners of the black arts getting stoned and/or getting others stoned. This cut them off from God and allowed demons to influence them....it opens a gateway in our minds that demons exploit which is why scripture teaches Christians not do it.
Now if one removes God and the notion that we should strive to reconcile with God then there is no moral difference between the two. Of course without God and his laws there's no need to respect any morality at all.
“Drunkness is of course not good, but consumption of alcohol in small quantities doesn’t impair our ability to have a real spiritual existence.”
Neither does the medicinal use of cannabis in small doses. Christ is Lord whether I’ve been altered by a prescribed medication like Ativan or Prozac for anxiety/depression or by prescribed cannabis oil.
Thankfully for me, cannabis treats my anxiety/depression issues far better than Ativan/Prozac ever did AND I’m able to be more active in our parish to the point of being the bass player for the 10am Mass group. Plus, since I feel so much better these days (Thank you, Lord Jesus), attending Mass is again a joyful experience for me.
Are you claiming that "witchcraft" or "sorcery" is a mistranslation, and that it ought more properly be translated as "drug use"? If so: how did every Bible translator get it wrong, while you know the answer?