Sure, but the phenomenon exists across all the threads about cannabis.
I think it's a recently developed pushback to the widespread love cannabis has received online for a long time. For a long time, it has been either heralded as a gateway drug or a magical cure all that could do no wrong.
Now that it is much more widely available and many more people have actually tried it for extended periods of time, the narrative has shifted.
How does saying you have anxiety when you smoke weed push back against people who were overly positive about it though?
To provide a counterpoint to the, "Weed is good. Weed can do no wrong." view that many have had about it.