I'll add my two cents to this very old thread.
First, there's almost never consensus among scientists about anything, and scientists themselves are not without their peculiar biases.
Want a scientific paper done on something? The results are always skewed in the direction that sheds a more positive light on the paying group.
There's tons of papers showing marijuana use to have a negative impact on people with mental health issues, even and up to the potential of causing mental health issues in some age groups but those are easily shoved under the rug by those with power to do the shoving, and new scientific papers readily available to uphold that shows marijuana use in a singularly positive light.
We can see the same with climate change, is climate change caused by humans or is it the natural course of events for our planet? Scientist's everywhere disagree, and there's perfectly scientific peer reviewed papers on both sides of the issue.
If you haven't read and digested every side of an issue you really can't take a stance that such and such a position is "scientific" and based in knowledge and truth when even scientists disagree amongst themselves.
There's usually balance to be had in all things, and I'm wary of anyone who believes there's only one aspect of any issue, regardless of the issue.