There are programs to help people quit smoking and drinking. I smoked all my life from 14 years old... many, many years. More than half my life, I went for hypnosis 8 or 9 years ago and stopped immediately. One of the reasons for doing this was I had this annoying little cough, and the last thing I wished was to bark over some basin every morning for the rest of my life.
Same with drinking, although not my problem I have watched friends kill themselves by drinking... a very painful death. They too had many opportunities to stop drinking but didnt preferring to let it get out of hand, so if they did eventually stop they weren't even allowed to toast at a wedding. But then again, an ex boyfriend stopped drinking many years after we broke up because he was an alcoholic. I often worried about him and was delighted to find out he had kicked the habit. Where there's a will there's a way, otherwise its slow suicide.
These two habits are slow suicide, no getting away from it. Okay, 10% will dodge the bullet, the rest of the 90%... they may as well put one in their head right now if they are to allow either of these poisons to become habits.

