This is true whether or not you drink, smoke, excercise, eat red meat or believe it or not practice vegetarianism (which incidentally is an afront to nature and evolution). If you are lucky you'll get taken out by something massive or aggressive while you still have a reasonable quality of life. If you are unlucky you become a dribbling wreck who can't remeber their own name and has to be spoon fed pureed steam and assisted to use the loo.
Thankfully No-one lives for ever. what a miserable and overcrowded place this would be if we did.