I'm terribly sorry for your mother's suffering and loss. I know that her death was hard and you will always be touched by it.
Cancer is, unfortunately, a fact of life, like the common cold. Some of us are genetically conditioned to get it, others aren't. Some people get diabetes, others don't. Life is what it is. Scare stories are not a cure and, in the long run, those who are genetically disposed to the disease are going to get it, no matter how many scare stories there are. Maybe controlling metasis (sp) can lead to a cure, or just a better treatment to controls the spread. The one thing I know is that it won't likely happen during my lifetime.