Can anybody explain me (or recommend any resources that explains) what benefit does it have to make it illegal to have these substances?
From my point of view, it does not fix the problem of having people consume them, and it does harm the time it takes for us to have serious scientific tests that assess if they have any good benefits at all.
I think you're not the "shaman" he's referring to.
By "big brain type system shaman" I understood someone who doesn't necessarily write code, but instead, e.g. sells courses around the topic, getting people hyped about it, etc.
He uses the word "shaman" previously when talking about Agile, and there are many who fit that picture of working on selling courses, and not on developing software.
From my point of view, it does not fix the problem of having people consume them, and it does harm the time it takes for us to have serious scientific tests that assess if they have any good benefits at all.