Respectfully, Tom, one of the healthiest people I know, my 83-year-old father, has smoked his whole life. That doesn’t mean smoking is good for us. Science looks at all the data and evidence, not anecdotes. We can ignore the science if we choose, our individual experiences and perceptions don’t negate the science. (And yes, science isn’t always certain, but on most topics it eventually gets there, and that’s the beauty of it.)