And the causality can be linked to websites like Facebook as easily as cancer to cigarettes.
This stuff was trending upward far before social media. See e.g. Putnam in Bowling Alone for a far more convincing explanation.
Facebook is the snake oil you're being sold as the cure for something that was already on its way up.
"The U.S. Surgeon General estimates that living with a smoker increases a nonsmoker’s chances of developing lung cancer by 20 to 30 percent."
"There is no safe level of exposure to secondhand smoke."
-- https://www.cancer.gov/about-cancer/causes-prevention/risk/t...
Maybe we'll get a chance to argue it another time :)