If you actually read the Wikipedia link you posted you would see that nicotine's effects are minor in adults. Definitely less dangerous than, for example, breat

If you actually read the Wikipedia link you posted you would see that nicotine's effects are minor in adults. Definitely less dangerous than, for example, breathing car waste everyday by living in a city. This of course regards only nicotine, and not all the other chemicals associated with any kind of smoking/vaping.