You are missing the point. For the most part, the list of some 600
additives in cigarettes is mainly composed of flavorants (the majority actually approved food additives), plus things like the glue. These are NOT for the most part the known (and unknown) carcinogens and other toxic components of smoke that cause harm and disease. The carcinogens and toxic chemicals that cause the harm are the products of combustion, that get CREATED when the cigarette is burned. See,
Harms of Smoking and Health Benefits of Quitting - National Cancer Institute, and
http://quitsmoking.about.com/cs/nicotineinhaler/a/cigingredients.htm
For example, benzene, beryllium, vinyl cloride, benzo(a)pyrene, toluene, ethylene oxide, etc, etc, etc, are among the known carcinogenic chemicals in smoke created by combustion (and among the 7,000 or more chemical constituents of smoke). They are not added. They are created by combustion. Reference the cancer.gov cite above.
Another set of carcinogens smoking exposes us to are the tobacco specific nitrosamines, again not added, but naturally present in tobacco and released by it's burning - just as other carcinogenic nitrosamines are formed by cooking/frying/charing food (as in bacon, cured meats, barbequed meats, etc). See,
Nitrosamines and Cancer
The quantities of tobacco specific nitrosamines we are exposed to from cigarette smoking are very high, but depending on the method of processing, smokeless tobacco products such as Snus and dissolvables can have vastly reduced levels. And the same goes for nicotine products, such as FDA approved smoking cessation patches, gums and inhalers, and e-cig liquid - since the nicotine comes from tobacco they all still have levels of TSNAs, but levels so tiny as to not amount to any real danger. See, page 16 of
http://casaa.info/uploads/CASAA_Legislative_Packet_Regarding_Indoor_Bans_Web.pdf