Thanks for your question. Not a problem to ask anything.
It's really difficult to answer. In some ways, I would say yes. The RT has so far been very easy. If it was guaranteed to cure me then I might have chosen this route. I was going to be on HT for 3 years and didn't fancy this. Also, you don't know if you cured (or in remission) until you are done with HT as well. So you have to wait.
On the other hand. There is no doubt that my cancer was far more extensive than first thought. This has only come to light following the surgery histology. Hence would my RT plan have done the job? Brachytherapy was never an option for me but I don't think would have worked.
It seems to me to be more difficult to deal with an outcome of failed RT. The main option here is even more difficult surgery.
My prostate has gone. Hence I know for a fact that no further cancer can grow from it.
As I say difficult to answer your question. There is uncertainty in which ever route is chosen.