There are no 100% guarantees when it comes to bc. I truly hope that all the publicity (Angelina etc) and sharing of people's opinions/stories/choices is not creating an unnecessary fear that having had cancer in one breast means that you have a really high chance of getting it in the other. For most of us that is not what the research shows.
It Concerns me that people who have not even been diagnosed and who have no comprehensive understanding or knowledge of bc are making statements about what they would do if faced with a diagnosis. I for one learnt an awful lot in the first few days after diagnosis. Most of this from the highly experienced and qualified female surgeon that I was referred to.
I listened when she explained why she recommended the surgery (a single mastectomy) she did, for me, in my particular situation. She explained that I always had the option of further surgery (and reconstruction if I wished) if that was how I felt after treatment. My treatment for the cancer I had already was the priority.
I then learnt a lot from my doctors, from other women with a bc diagnosis and from my own research while I was having chemo and radiation. I also had my own experience of what it was like to have a single mastectomy and had time to think about all the possibilities I had to consider.
For me, I decided that I was most comfortable with no more surgery. I believe that I have a relatively low (but understand it is not 0) chance of getting cancer in my healthy breast. I based my decision on information from my doctors. I choose to live a healthy lifestyle which I hope reduces my chance of many serious diseases, not just bc. If nothing else it gives me the best quality of life for now. None of us can totally control the future and what might happen, even by removing both breasts.
The important thing is to feel informed about your choices and to feel you have a doctor who listens to your concerns and explains your options. Then it should be YOUR choice as it is your life to live the way you feel most comfortable. There are different views because no 2 people face the exact same situation. All that matters is that you understand and are as satisfied as you can be with your choices.