I don't have to read every scientific paper to see the big picture. Yes, a big part of it is politics. The way people's beliefs are manipulated is through the media. I don't have those beliefs anymore, so I can see through the propaganda.
Science only applies to a narrow set of conditions. If you consider only Science you can get bogged down in minute details and miss the big picture. The conclusions you reach from a scientific experiment are based on your previous beliefs. If you and I have different beliefs we will have different conclusions based on the same experiment.
The reason I brought up the Breast Cancer issue is because most people can see that it's not a sure thing that these women would get cancer. The doctors use the extreme fear these women have to scare them into getting the surgery. It's very similar to how people are taking hiv medication due to the fear of getting sick and dying.