“It will take ten years off of your life. Does that mean that you will look ten years younger?
If you are saying that a smoker dies 10 years before his time? How do you know when his time is up? Only G-d Knows. If you can predict the future can you tell me what next weeks winning Lotto number are.”
What a ridiculous argument. According to that logic, why don’t we all engage in other dangerous behaviors. Why don’t we run across the street without looking, because “only God knows when your time is up!”
Obviously a smoker doesn’t literally lose exactly ten years. That’s an average. Calculated from scientific studies of life expectancy of smokers and non-smokers, controlling for other variables.