Thanks for your posting
It is difficult to make decisions based on our symptoms if, as in the majority of cases, you have asymptomatic prostate cancer. However, in my case, my waterworks were suddenly (summer 2021) giving me a lot of grief and had really affected my quality of life; I had to empty my bladder frequently, there was considerable urinary retention and a constant stinging sensation, which affected my mood. 2 months or so after anti-androgens (Bicalutamide and Zoladex) the horrible UT symptoms improved and my mood brightened a lot.
I decided to have the RT as it was my only chance of a "cure" (I was given a 70% chance of remission based on my diagnosis - T3bN0M0, Gleeson 3+4, spread to seminal vesicles). I would also very much like to come off Zodalex (I've got another 18 months left of 3 years of Zodalex). I was told, verbally, that there was a risk that the RT could cause bladder and/ or bowel cancer, but I can't find a percentage risk of that in the consent form I signed or any other literature I was given. I've a vague recollection that RT induced cancer would only become apparent 15-20 years post RT.
I can understand your dilemma. I don't know your age, but that might be a factor in your choice. If you're in your 70s and can have 15 or so years without any RT induced cancer being apparent, then that might be different than it would be if you were in your 40s.
You seem to be very clued up and I'm sure you'll make the right choice for you.
Nigel