Originally Posted by RutgerF
Think it through, however:
  • Cannabis is a plant which grows by itself in any suitable climate. You don't have to do anything with it to get high, apart from optionally drying it, maybe.
  • With alcohol, you have to start with some plant rich in carbohydrates, and find a way to ferment it, which generally would require at least pottery. Not all regions of the planet were equally lucky with this: Australia, Siberia (and to a certain extent North America) had no exposure to any alcohol until the arrival of Europeans precisely due to the lack of suitable local cereals. And to distil that gruel, well that would require a still, which is a pure magick compared to a plant that doesn't require much care.
Your knowledge fails you here a bit. Alcohol isn't made only from plants. There are such drinks as https://en.wikipedia.org/wiki/Kumis
And now to the arguments at hand:
  • To discover that you can get high on cannabis you first of all need to decide to smoke it for some reason. And that's not something very natural. Humans really went inventive here.
  • To discover that fermented food can get you strangely light, you just need accidentally allow it to "spoil" a bit. And that's what happens even nowadays with fridges in every house.