.. just said something brilliant.
She was discussing worry -- and she said that she used to worry about breast cancer and other kinds of cancer. She spent a lot of time and energy doing so, having things cut off etc..
She decided that she was going to stop worrying about it. Her reason was simple, worrying about it doesn't prevent it and IF it happened, she didn't want her time 'before' to be wasted worrying about it. Also, worrying about it just increases the pain from something that will already be difficult to deal with.