OP's original question has morphed into the question of powerlessness, where we already have a perfectly good thread in the other forum on the same topic.
Somehow, the question of one's powerlessness over a self destructive behaviour is described as our inability to change forces majeure, or acts of God, like major cataclysmic weather events. Or powerlessness over the results of mutating DNA inside our bodies. I don't think these comparisons are apt in the slightest, and are unfair to victims of typhoon haiyan or uterine cancer.
I do believe that we can change harmful behaviours by efforts of will and learning. We can use our brains to change harmful thinking patterns, and then to change the harmful behaviours. Children do this all the time as they grow up, and it is saddening to think that we have somehow lost this ability as adults.
Keep on truckin', Mr Natural.