Chamblee54, you might want to take a look at a review done by "The Lancet" two years ago -

"Androgen deprivation therapy use and duration with definitive radiotherapy for localised prostate cancer: an individual patient data meta-analysis" (search for https://doi.org/10.1016/S1470-2045(21)00705-1 ).
It found the addition of just 3 months of ADT decreased the cumulative incidence of Prostate Specific Antigen (PSA) progression, local progression, and improved event-free survival, and reduced adverse outcomes by more than a third; 6 months of ADT cut the risk for adverse outcomes in half.
See also DOI: 10.1007/s00345-024-04862-0

The two questions I asked myself were:
1. How much longer might I live, but for my prostate cancer? - Answer: Although I am 78 and have some other health issues, I am overall pretty healthy for my age, with better than 50% chance of another 10 years, and better than 25% chance of 15 years.
2. How much am I willing to do now - while I am healthy enough to deal with any side effects - to minimize my chances of suffering metastasis, chemo, etc in the years ahead? Answer: A lot.

Everyone must make their own choice, with no guarantee what the outcome will be. I don't think the temporary side effects of thorough treatment now will diminish my overall quality of life all that much, compared to the (admittedly small) chance of a really bad outcome if I don't.

I watched my Mom die of breast cancer in 1969, and my wife die of PSP three years ago. No doubt, those experiences influence my own choice now.

I have decided to "prophylactically" treat aggressively now, in the hope of avoiding a worse outcome in my final years.