Maybe it helps to visualise it like this. Out of 100 people with similar pathology to yours, an extra 5 to 10 will not have a recurrence if they take the hormone therapy. (This is on top of the % chance you already have after your other treatment).You could be one of them. Statistics are the only guide we have when making these decisions but for me it really helped to understand it like I have tried to explain.
Everyone is different. I view the hormone therapy (I am on Letrozole or Femara) as something that could save or at least prolong my life. I have found a way to minimise most of the side effects I have experienced. Unfortunately our choices are not always easy but at least at this point we do have options. I chose the option that I felt gave me the best chance against this horrible disease. So far so good (4 1/2 years after Stage 3a Grade 2 diagnosis).