@Nailit - \if you are looking at deaths due to smoking, that is correct. The causes of death through smoking are through cancer and respiratory/cardiocascular problems, which are not directly attributable to nicotine.
What nicotine does is to act as a hook, a habit which becomes very difficult to break.
However, just because we can now separate nicotine from the other constituents of cigarettes/tobacco/cigars does not make it safe, nor a good thing to take, simply because it will still feed the addiction, and because nicotine itself is extremely toxic, and people can suffer ill-effects through exposire to large quantities - even death.