The RO is a Radiation Oncologist and trained in both disciplines.

I would follow the Dr's recommendation (and reluctantly did so myself).

For my Salvage Radiation Treatment, my RO recommended WPRT and 4 mos ADT (I took and would suggest Orgovyx if it is affordable for you).

I resisted the ADT. My RO thought that my result would be better with ADT. I hated it, but near the end of the treatment, if he said 2 additional months, I would have sucked it up and taken the additional ADT. That reflects my personal concern and uncertainty about fully treating my PCa.

If you do not trust the RO, get a 2d RO opinion. If he or she is going to be your treating physician, then their opinion should prevail

All in my Layman's opinion.