alt Hacker NewsThere is no evidence of that. What you say is not supporting, but rather "conveniently makes sense".
I don't dispute the utility of psychedelics. But I have observed (and this is anecdotal) that the fanatic devotees of the drugs tend to engage in magical thinking around the power/history/whatever of psychedelic substances, no matter their intelligence or accomplishment, or rigorous critical thinking in other areas.
It’s a controversial theory, but it does exist[0]. As far as I know, there is no prevailing theory about where consciousness came from so speculating based on existing theories isn’t claiming it’s the truth.
Is it such a leap that fungi are one of the few natural drugs that cause brain elasticity so maybe our early ancestors took it to get the evolutionary process started.
0. https://en.wikipedia.org/wiki/Stoned_ape_theory