Nicotine and smoking tobacco are highly addictive and dangerous and while smoking weed has similar dangers to the lungs, taking it other ways isn't addictive or dangerous in the ways nicotine is.
I also disapprove of a tobacco ban, but that's because I smoke. Admittedly, nicotine is a shit drug, though, and if I lose my naughty cigarette on the deck drinking with my besties, that's okay.
It just seems like it's antithetical to all the reasons we made weed legal. People are going to do it anyways, might as well make it regulated and collect tax on it. I don't smoke tobacco but I just think making it illegal won't change anything. Let people make their own decisions, you know?