

I probably overstated by saying it is equally dangerous with somebody driving drunk. However, there are lots of studies that show it causes serious impairment.
https://jamanetwork.com/journals/jamapsychiatry/fullarticle/2788264
https://pmc.ncbi.nlm.nih.gov/articles/PMC9940647/
https://jcannabisresearch.biomedcentral.com/articles/10.1186/s42238-023-00202-y
Here is the original study. He shows that on certain issues of governance, the far right and far left are more similar than the center.
He also cherrypicks 7 data points out of hundreds (from 2008-2014) to support his conclusion. He provides no criteria for inclusion of these particular data points.
The authors of this article (found here) also equate Joe Biden with centrism, providing no evidence. Would he really rate his views as a “5” or “6” on a scale from 1-10, as these authors suggest? I doubt it, but like the authors of this article, I simply do not know.
Using another metric of his positions suggests that he would be around a 2, making it irrelevant to this study, which focuses on only 5-6.
I’ll stop here because this comment is already better researched that the article in the meme.