I get it that cigarettes are risky. Studies show that because all cig smokers inhale, the introduction of nicotine and other chemicals is somewhere between 100-200 times the amount that a pipe or cigar smoker that does not inhale receives through the the epidermal layers of the mouth. Sure it's still not good for you and if you inhale well, that's another story.
Cigarettes are made for the sole purpose of delivering nicotine as quickly into the bloodstream as possible. Some would argue it's not even real tobacco that you're smoking.
This interesting video from the History Channel:
Smoking a pipe is kinda like getting "baked" and most of us smoke much less that a cig smoker per diem hence why most of us are not nicotine dependent or addicted. I would miss my pipe if I didn't smoke for a month, but I would be breaking furniture and kicking the dog by day 3 or 4 like a cig smoker.