Earlier quoted context omitted.
Cannabis is widely used today. Half of US adults have smoked it at one point of their life. 20% regularly smoke it. We are at the point where more people use it than alcohol in the US.
From the standpoint of "hard to ban what's used by a large part of the population" this does justify legalization indeed. I don't have strong opinions on this, I was mostly a bit triggered by the parent's comment weird theory that "cannabis was only forbidden because of criminal big pharma". (I assumed "only reason" implied that they thought it was a safe drug without side-effects or risks; all (medical/non-medical)…
I think they meant more that the negative effects don't seem that big because most people are ok even with such a large proportion of people already being experienced with it.
> triggered by the parent's comment weird theory that "cannabis was only forbidden because of criminal big pharma".
I don't believe it was either but I'm not sure your counter evidence really works. The science that you alluded to about long term effects all significantly post-dates the ban so couldn't have played a role in it.