What if indeed❣️ I can only tell you my story and my families stories. Two brothers a cousin and myself all had radiation. Mine was 20 years ago and does not even resemble what they do now. My cousin had 5 weeks and my husband had 6 weeks (prostrate) my brother had 3 weeks (lung) overwhelmingly the side effect was fatigue. Then recovery from fatigue. In my case it was a small part of treatment and frankly the easiest, of the multiple surgeries, chemo, radiation and endocrine therapy program.
When it did recur, I did not have to ask myself if I had done everything I could to prevent it. I was 35 and quite a few family have died young from cancer, I didn’t want to join them.
If I was given your choice I would take the radiation because it is short duration and done, unlike the endocrine therapy which can go on for years. Also I could save that tool in the box for later if I needed it.
I could feel like I covered that “what if” without a significant disruption to my quality of life.
Are you an active person? Do you have family you can discuss this with?