Uh yeah, actually you are..
See.. Simple = easy. It isn't simple.
Neat. A) addiction is a psychological disorder, as well as a physical one. B) we're all animals who act upon certain instincts.
And lastly..he does care about his health or he wouldn't be attempting to stop. But that whole "dont you care about your health" argument could be applied to practically anything in life. Eating a cheeseburger, smoking, drinking. Everyone has bad habits. Anyway, you've never smoked (I assume), or atleast you've never been addicted, so I really don't see how any of your arguments are very valid. Having friends who've smoked means nothing.