I stand corrected. I remember reading somewhere that smokers have just as much, if not more risk of oral cancer compared to smokeless tobacco users. Maybe that's still true, but I don't have the time to check this. Your source certainly doesn't agree with it.
You should challenge anything that is posted on government websites.
Remember that Swedish Snus and smokeless Tobacco (chew, dip, etc) are not the same and do not share the same statistics.
Also, American Snus vs Swedish Snus are both completely different products. American Snus has the same risks as chew while the other one has very low cancer rates (almost non-existant).
So point being, if you are a smoker, or a dipper, or know of any, get them to switch to Swedish snus.
You're better off not doing anything, but that goes without saying. As always, it's the man-made chemicals that kill you with Tobacco (which is why Swedish snus has been so successful because it's purified). Bringing this back to topic, Cannabis is not man made and there is no man-made part to it.