Yes, I know that. The point is, Tobacco=plant. Coffee bean=plant. Make sense now?
Unfortunately, it's not that simple. Nearly all of the consumed nicotine in the U.S. is extracted from tobacco, because extracting it from other plants is cost prohibitive and synthetic nicotine hasn't been approved for human consumption (as far as I was able to find.) Also, as far as I could find, caffeine has one classification - a natural food ingredient and additive. It isn't being used as a drug treatment as the sole active ingredient, so it doesn't have the 2 different classifications like nicotine has. People aren't using caffeine as a treatment to end caffeine addiction.
Additionally, the health advocates have convinced the public and legislators that tobacco is ONLY used for the nicotine and all tobacco is bad. Caffeine doesn't have that stigma and the perception is that people just enjoy coffee, tea and soda for the taste and don't drink it ONLY to get caffeine. (Note that energy drinks, which ARE dedicated to delivering caffeine, are getting push back from health groups.) Caffeine is also available in large amounts in cocoa, sunflower seeds, yerba mate and guarana. So, it's a lot harder to peg caffeine as a "coffee product." On the other hand, nicotine is strongly tied to tobacco, because it has been the ONLY source of nicotine for hundreds of years.
So, what seems like a clear comparison really isn't.