The dangers of tobacco were known centuries before the Great Depression. This is well known and has been covered extensively by historical works on the subject

The dangers of tobacco were known centuries before the Great Depression. This is well known and has been covered extensively by historical works on the subject. Closer to home, within the twentieth century, Max MacLevy’s book "Tobacco Habit Easily Conquered” (1916) was well known, as was Louis L. Krauss’ "Tobacco Mysteries Exposed and Habit Conquered” (1917). Krauss lists the available evidence as to the known dangers of tobacco for almost 100 pages. This was in 1917. We also know that the public was exposed to much of the information in Krauss’ book. I haven’t even brought up the Germans. Any cursory review of the the history and harm of tobacco shows this is true. Your counterargument is just wrong, and given its latest iteration, has now devolved into no true Scotsman.