Surgery & God

I guess if you make the argument that if humanity has set itself up for a particular problem, lets continue using the example of cancer, then you could claim that the human solution of surgery is not actually going going against god's will, but instead repairing human's damaged by human's. However, if you believe god has willed you to be faced with death, how do you justify going against it and saving yourself? I suppose if you believe in him as an omnipotent being, you say, "Look, if he wanted to kill me, he would just do it." Would he really? Could he really? I don't know now. Arguing about the idea of god and omnipotent entities will only take us in circles forever. I will stop there now. I retract the confidence with which I a made a certain statement regarding god and surgeries in my previous post.